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6a1aa64f DV |
1 | // Copyright 2006 Dan Vanderkam (danvdk@gmail.com) |
2 | // All Rights Reserved. | |
3 | ||
4 | /** | |
5 | * @fileoverview Creates an interactive, zoomable graph based on a CSV file or | |
285a6bda DV |
6 | * string. Dygraph can handle multiple series with or without error bars. The |
7 | * date/value ranges will be automatically set. Dygraph uses the | |
6a1aa64f DV |
8 | * <canvas> tag, so it only works in FF1.5+. |
9 | * @author danvdk@gmail.com (Dan Vanderkam) | |
10 | ||
11 | Usage: | |
12 | <div id="graphdiv" style="width:800px; height:500px;"></div> | |
13 | <script type="text/javascript"> | |
285a6bda DV |
14 | new Dygraph(document.getElementById("graphdiv"), |
15 | "datafile.csv", // CSV file with headers | |
16 | { }); // options | |
6a1aa64f DV |
17 | </script> |
18 | ||
19 | The CSV file is of the form | |
20 | ||
285a6bda | 21 | Date,SeriesA,SeriesB,SeriesC |
6a1aa64f DV |
22 | YYYYMMDD,A1,B1,C1 |
23 | YYYYMMDD,A2,B2,C2 | |
24 | ||
6a1aa64f DV |
25 | If the 'errorBars' option is set in the constructor, the input should be of |
26 | the form | |
285a6bda | 27 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
28 | YYYYMMDD,A1,sigmaA1,B1,sigmaB1,... |
29 | YYYYMMDD,A2,sigmaA2,B2,sigmaB2,... | |
30 | ||
31 | If the 'fractions' option is set, the input should be of the form: | |
32 | ||
285a6bda | 33 | Date,SeriesA,SeriesB,... |
6a1aa64f DV |
34 | YYYYMMDD,A1/B1,A2/B2,... |
35 | YYYYMMDD,A1/B1,A2/B2,... | |
36 | ||
37 | And error bars will be calculated automatically using a binomial distribution. | |
38 | ||
727439b4 | 39 | For further documentation and examples, see http://dygraphs.com/ |
6a1aa64f DV |
40 | |
41 | */ | |
42 | ||
43 | /** | |
44 | * An interactive, zoomable graph | |
45 | * @param {String | Function} file A file containing CSV data or a function that | |
46 | * returns this data. The expected format for each line is | |
47 | * YYYYMMDD,val1,val2,... or, if attrs.errorBars is set, | |
48 | * YYYYMMDD,val1,stddev1,val2,stddev2,... | |
6a1aa64f DV |
49 | * @param {Object} attrs Various other attributes, e.g. errorBars determines |
50 | * whether the input data contains error ranges. | |
51 | */ | |
285a6bda DV |
52 | Dygraph = function(div, data, opts) { |
53 | if (arguments.length > 0) { | |
54 | if (arguments.length == 4) { | |
55 | // Old versions of dygraphs took in the series labels as a constructor | |
56 | // parameter. This doesn't make sense anymore, but it's easy to continue | |
57 | // to support this usage. | |
58 | this.warn("Using deprecated four-argument dygraph constructor"); | |
59 | this.__old_init__(div, data, arguments[2], arguments[3]); | |
60 | } else { | |
61 | this.__init__(div, data, opts); | |
62 | } | |
63 | } | |
6a1aa64f DV |
64 | }; |
65 | ||
285a6bda DV |
66 | Dygraph.NAME = "Dygraph"; |
67 | Dygraph.VERSION = "1.2"; | |
68 | Dygraph.__repr__ = function() { | |
6a1aa64f DV |
69 | return "[" + this.NAME + " " + this.VERSION + "]"; |
70 | }; | |
285a6bda | 71 | Dygraph.toString = function() { |
6a1aa64f DV |
72 | return this.__repr__(); |
73 | }; | |
74 | ||
15b00ba8 | 75 | /** |
7201b11e JB |
76 | * Formatting to use for an integer number. |
77 | * | |
78 | * @param {Number} x The number to format | |
79 | * @param {Number} unused_precision The precision to use, ignored. | |
80 | * @return {String} A string formatted like %g in printf. The max generated | |
81 | * string length should be precision + 6 (e.g 1.123e+300). | |
82 | */ | |
83 | Dygraph.intFormat = function(x, unused_precision) { | |
84 | return x.toString(); | |
85 | } | |
86 | ||
87 | /** | |
15b00ba8 JB |
88 | * Number formatting function which mimicks the behavior of %g in printf, i.e. |
89 | * either exponential or fixed format (without trailing 0s) is used depending on | |
90 | * the length of the generated string. The advantage of this format is that | |
062ef401 JB |
91 | * there is a predictable upper bound on the resulting string length, |
92 | * significant figures are not dropped, and normal numbers are not displayed in | |
93 | * exponential notation. | |
15b00ba8 JB |
94 | * |
95 | * NOTE: JavaScript's native toPrecision() is NOT a drop-in replacement for %g. | |
96 | * It creates strings which are too long for absolute values between 10^-4 and | |
062ef401 | 97 | * 10^-6. See tests/number-format.html for output examples. |
15b00ba8 JB |
98 | * |
99 | * @param {Number} x The number to format | |
100 | * @param {Number} opt_precision The precision to use, default 2. | |
101 | * @return {String} A string formatted like %g in printf. The max generated | |
062ef401 | 102 | * string length should be precision + 6 (e.g 1.123e+300). |
15b00ba8 | 103 | */ |
7201b11e | 104 | Dygraph.floatFormat = function(x, opt_precision) { |
15b00ba8 JB |
105 | // Avoid invalid precision values; [1, 21] is the valid range. |
106 | var p = Math.min(Math.max(1, opt_precision || 2), 21); | |
107 | ||
108 | // This is deceptively simple. The actual algorithm comes from: | |
109 | // | |
110 | // Max allowed length = p + 4 | |
111 | // where 4 comes from 'e+n' and '.'. | |
112 | // | |
113 | // Length of fixed format = 2 + y + p | |
114 | // where 2 comes from '0.' and y = # of leading zeroes. | |
115 | // | |
116 | // Equating the two and solving for y yields y = 2, or 0.00xxxx which is | |
117 | // 1.0e-3. | |
118 | // | |
119 | // Since the behavior of toPrecision() is identical for larger numbers, we | |
120 | // don't have to worry about the other bound. | |
121 | // | |
122 | // Finally, the argument for toExponential() is the number of trailing digits, | |
123 | // so we take off 1 for the value before the '.'. | |
124 | return (Math.abs(x) < 1.0e-3 && x != 0.0) ? | |
125 | x.toExponential(p - 1) : x.toPrecision(p); | |
126 | }; | |
127 | ||
6a1aa64f | 128 | // Various default values |
285a6bda DV |
129 | Dygraph.DEFAULT_ROLL_PERIOD = 1; |
130 | Dygraph.DEFAULT_WIDTH = 480; | |
131 | Dygraph.DEFAULT_HEIGHT = 320; | |
132 | Dygraph.AXIS_LINE_WIDTH = 0.3; | |
6a1aa64f | 133 | |
d59b6f34 | 134 | Dygraph.LOG_SCALE = 10; |
0037b2a4 | 135 | Dygraph.LN_TEN = Math.log(Dygraph.LOG_SCALE); |
d59b6f34 | 136 | Dygraph.log10 = function(x) { |
0037b2a4 | 137 | return Math.log(x) / Dygraph.LN_TEN; |
d59b6f34 | 138 | } |
062ef401 | 139 | |
8e4a6af3 | 140 | // Default attribute values. |
285a6bda | 141 | Dygraph.DEFAULT_ATTRS = { |
a9fc39ab | 142 | highlightCircleSize: 3, |
8e4a6af3 | 143 | pixelsPerXLabel: 60, |
c6336f04 | 144 | pixelsPerYLabel: 30, |
285a6bda | 145 | |
8e4a6af3 DV |
146 | labelsDivWidth: 250, |
147 | labelsDivStyles: { | |
148 | // TODO(danvk): move defaults from createStatusMessage_ here. | |
285a6bda DV |
149 | }, |
150 | labelsSeparateLines: false, | |
bcd3ebf0 | 151 | labelsShowZeroValues: true, |
285a6bda | 152 | labelsKMB: false, |
afefbcdb | 153 | labelsKMG2: false, |
d160cc3b | 154 | showLabelsOnHighlight: true, |
12e4c741 | 155 | |
4cb5e2d2 JB |
156 | yValueFormatter: function(x, opt_precision) { |
157 | var s = Dygraph.floatFormat(x, opt_precision); | |
158 | var s2 = Dygraph.intFormat(x); | |
d916677a | 159 | return s.length < s2.length ? s : s2; |
4cb5e2d2 | 160 | }, |
285a6bda DV |
161 | |
162 | strokeWidth: 1.0, | |
8e4a6af3 | 163 | |
8846615a DV |
164 | axisTickSize: 3, |
165 | axisLabelFontSize: 14, | |
166 | xAxisLabelWidth: 50, | |
167 | yAxisLabelWidth: 50, | |
bf640e56 | 168 | xAxisLabelFormatter: Dygraph.dateAxisFormatter, |
8846615a | 169 | rightGap: 5, |
285a6bda DV |
170 | |
171 | showRoller: false, | |
172 | xValueFormatter: Dygraph.dateString_, | |
173 | xValueParser: Dygraph.dateParser, | |
174 | xTicker: Dygraph.dateTicker, | |
175 | ||
3d67f03b DV |
176 | delimiter: ',', |
177 | ||
285a6bda DV |
178 | sigma: 2.0, |
179 | errorBars: false, | |
180 | fractions: false, | |
181 | wilsonInterval: true, // only relevant if fractions is true | |
5954ef32 | 182 | customBars: false, |
43af96e7 NK |
183 | fillGraph: false, |
184 | fillAlpha: 0.15, | |
f032c51d | 185 | connectSeparatedPoints: false, |
43af96e7 NK |
186 | |
187 | stackedGraph: false, | |
afdc483f NN |
188 | hideOverlayOnMouseOut: true, |
189 | ||
2fccd3dc DV |
190 | // TODO(danvk): support 'onmouseover' and 'never', and remove synonyms. |
191 | legend: 'onmouseover', // the only relevant value at the moment is 'always'. | |
192 | ||
00c281d4 | 193 | stepPlot: false, |
062ef401 JB |
194 | avoidMinZero: false, |
195 | ||
196 | interactionModel: null // will be set to Dygraph.defaultInteractionModel. | |
285a6bda DV |
197 | }; |
198 | ||
199 | // Various logging levels. | |
200 | Dygraph.DEBUG = 1; | |
201 | Dygraph.INFO = 2; | |
202 | Dygraph.WARNING = 3; | |
203 | Dygraph.ERROR = 3; | |
204 | ||
39b0e098 RK |
205 | // Directions for panning and zooming. Use bit operations when combined |
206 | // values are possible. | |
207 | Dygraph.HORIZONTAL = 1; | |
208 | Dygraph.VERTICAL = 2; | |
209 | ||
5c528fa2 DV |
210 | // Used for initializing annotation CSS rules only once. |
211 | Dygraph.addedAnnotationCSS = false; | |
212 | ||
285a6bda DV |
213 | Dygraph.prototype.__old_init__ = function(div, file, labels, attrs) { |
214 | // Labels is no longer a constructor parameter, since it's typically set | |
215 | // directly from the data source. It also conains a name for the x-axis, | |
216 | // which the previous constructor form did not. | |
217 | if (labels != null) { | |
218 | var new_labels = ["Date"]; | |
219 | for (var i = 0; i < labels.length; i++) new_labels.push(labels[i]); | |
fc80a396 | 220 | Dygraph.update(attrs, { 'labels': new_labels }); |
285a6bda DV |
221 | } |
222 | this.__init__(div, file, attrs); | |
8e4a6af3 DV |
223 | }; |
224 | ||
6a1aa64f | 225 | /** |
285a6bda | 226 | * Initializes the Dygraph. This creates a new DIV and constructs the PlotKit |
7aedf6fe | 227 | * and context <canvas> inside of it. See the constructor for details. |
6a1aa64f | 228 | * on the parameters. |
12e4c741 | 229 | * @param {Element} div the Element to render the graph into. |
6a1aa64f | 230 | * @param {String | Function} file Source data |
6a1aa64f DV |
231 | * @param {Object} attrs Miscellaneous other options |
232 | * @private | |
233 | */ | |
285a6bda | 234 | Dygraph.prototype.__init__ = function(div, file, attrs) { |
a2c8fff4 DV |
235 | // Hack for IE: if we're using excanvas and the document hasn't finished |
236 | // loading yet (and hence may not have initialized whatever it needs to | |
237 | // initialize), then keep calling this routine periodically until it has. | |
238 | if (/MSIE/.test(navigator.userAgent) && !window.opera && | |
239 | typeof(G_vmlCanvasManager) != 'undefined' && | |
240 | document.readyState != 'complete') { | |
241 | var self = this; | |
242 | setTimeout(function() { self.__init__(div, file, attrs) }, 100); | |
243 | } | |
244 | ||
285a6bda DV |
245 | // Support two-argument constructor |
246 | if (attrs == null) { attrs = {}; } | |
247 | ||
6a1aa64f | 248 | // Copy the important bits into the object |
32988383 | 249 | // TODO(danvk): most of these should just stay in the attrs_ dictionary. |
6a1aa64f | 250 | this.maindiv_ = div; |
6a1aa64f | 251 | this.file_ = file; |
285a6bda | 252 | this.rollPeriod_ = attrs.rollPeriod || Dygraph.DEFAULT_ROLL_PERIOD; |
6a1aa64f | 253 | this.previousVerticalX_ = -1; |
6a1aa64f | 254 | this.fractions_ = attrs.fractions || false; |
6a1aa64f | 255 | this.dateWindow_ = attrs.dateWindow || null; |
8b83c6cc | 256 | |
6a1aa64f | 257 | this.wilsonInterval_ = attrs.wilsonInterval || true; |
fe0b7c03 | 258 | this.is_initial_draw_ = true; |
5c528fa2 | 259 | this.annotations_ = []; |
7aedf6fe | 260 | |
6be8e54c JB |
261 | // Number of digits to use when labeling the x (if numeric) and y axis |
262 | // ticks. | |
263 | this.numXDigits_ = 2; | |
264 | this.numYDigits_ = 2; | |
265 | ||
266 | // When labeling x (if numeric) or y values in the legend, there are | |
267 | // numDigits + numExtraDigits of precision used. For axes labels with N | |
268 | // digits of precision, the data should be displayed with at least N+1 digits | |
269 | // of precision. The reason for this is to divide each interval between | |
270 | // successive ticks into tenths (for 1) or hundredths (for 2), etc. For | |
271 | // example, if the labels are [0, 1, 2], we want data to be displayed as | |
272 | // 0.1, 1.3, etc. | |
273 | this.numExtraDigits_ = 1; | |
8e4a6af3 | 274 | |
f7d6278e DV |
275 | // Clear the div. This ensure that, if multiple dygraphs are passed the same |
276 | // div, then only one will be drawn. | |
277 | div.innerHTML = ""; | |
278 | ||
c21d2c2d | 279 | // If the div isn't already sized then inherit from our attrs or |
280 | // give it a default size. | |
285a6bda | 281 | if (div.style.width == '') { |
ddd1b11f | 282 | div.style.width = (attrs.width || Dygraph.DEFAULT_WIDTH) + "px"; |
285a6bda DV |
283 | } |
284 | if (div.style.height == '') { | |
ddd1b11f | 285 | div.style.height = (attrs.height || Dygraph.DEFAULT_HEIGHT) + "px"; |
32988383 | 286 | } |
285a6bda DV |
287 | this.width_ = parseInt(div.style.width, 10); |
288 | this.height_ = parseInt(div.style.height, 10); | |
c21d2c2d | 289 | // The div might have been specified as percent of the current window size, |
290 | // convert that to an appropriate number of pixels. | |
291 | if (div.style.width.indexOf("%") == div.style.width.length - 1) { | |
c6f45033 | 292 | this.width_ = div.offsetWidth; |
c21d2c2d | 293 | } |
294 | if (div.style.height.indexOf("%") == div.style.height.length - 1) { | |
c6f45033 | 295 | this.height_ = div.offsetHeight; |
c21d2c2d | 296 | } |
32988383 | 297 | |
10a6456d DV |
298 | if (this.width_ == 0) { |
299 | this.error("dygraph has zero width. Please specify a width in pixels."); | |
300 | } | |
301 | if (this.height_ == 0) { | |
302 | this.error("dygraph has zero height. Please specify a height in pixels."); | |
303 | } | |
304 | ||
344ba8c0 | 305 | // TODO(danvk): set fillGraph to be part of attrs_ here, not user_attrs_. |
43af96e7 NK |
306 | if (attrs['stackedGraph']) { |
307 | attrs['fillGraph'] = true; | |
308 | // TODO(nikhilk): Add any other stackedGraph checks here. | |
309 | } | |
310 | ||
285a6bda DV |
311 | // Dygraphs has many options, some of which interact with one another. |
312 | // To keep track of everything, we maintain two sets of options: | |
313 | // | |
c21d2c2d | 314 | // this.user_attrs_ only options explicitly set by the user. |
285a6bda DV |
315 | // this.attrs_ defaults, options derived from user_attrs_, data. |
316 | // | |
317 | // Options are then accessed this.attr_('attr'), which first looks at | |
318 | // user_attrs_ and then computed attrs_. This way Dygraphs can set intelligent | |
319 | // defaults without overriding behavior that the user specifically asks for. | |
320 | this.user_attrs_ = {}; | |
fc80a396 | 321 | Dygraph.update(this.user_attrs_, attrs); |
6a1aa64f | 322 | |
285a6bda | 323 | this.attrs_ = {}; |
fc80a396 | 324 | Dygraph.update(this.attrs_, Dygraph.DEFAULT_ATTRS); |
6a1aa64f | 325 | |
16269f6e | 326 | this.boundaryIds_ = []; |
6a1aa64f | 327 | |
285a6bda DV |
328 | // Make a note of whether labels will be pulled from the CSV file. |
329 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
6a1aa64f DV |
330 | |
331 | // Create the containing DIV and other interactive elements | |
332 | this.createInterface_(); | |
333 | ||
738fc797 | 334 | this.start_(); |
6a1aa64f DV |
335 | }; |
336 | ||
22bd1dfb RK |
337 | Dygraph.prototype.toString = function() { |
338 | var maindiv = this.maindiv_; | |
339 | var id = (maindiv && maindiv.id) ? maindiv.id : maindiv | |
340 | return "[Dygraph " + id + "]"; | |
341 | } | |
342 | ||
227b93cc DV |
343 | Dygraph.prototype.attr_ = function(name, seriesName) { |
344 | if (seriesName && | |
345 | typeof(this.user_attrs_[seriesName]) != 'undefined' && | |
346 | this.user_attrs_[seriesName] != null && | |
347 | typeof(this.user_attrs_[seriesName][name]) != 'undefined') { | |
348 | return this.user_attrs_[seriesName][name]; | |
450fe64b | 349 | } else if (typeof(this.user_attrs_[name]) != 'undefined') { |
285a6bda DV |
350 | return this.user_attrs_[name]; |
351 | } else if (typeof(this.attrs_[name]) != 'undefined') { | |
352 | return this.attrs_[name]; | |
353 | } else { | |
354 | return null; | |
355 | } | |
356 | }; | |
357 | ||
358 | // TODO(danvk): any way I can get the line numbers to be this.warn call? | |
359 | Dygraph.prototype.log = function(severity, message) { | |
360 | if (typeof(console) != 'undefined') { | |
361 | switch (severity) { | |
362 | case Dygraph.DEBUG: | |
363 | console.debug('dygraphs: ' + message); | |
364 | break; | |
365 | case Dygraph.INFO: | |
366 | console.info('dygraphs: ' + message); | |
367 | break; | |
368 | case Dygraph.WARNING: | |
369 | console.warn('dygraphs: ' + message); | |
370 | break; | |
371 | case Dygraph.ERROR: | |
372 | console.error('dygraphs: ' + message); | |
373 | break; | |
374 | } | |
375 | } | |
376 | } | |
377 | Dygraph.prototype.info = function(message) { | |
378 | this.log(Dygraph.INFO, message); | |
379 | } | |
380 | Dygraph.prototype.warn = function(message) { | |
381 | this.log(Dygraph.WARNING, message); | |
382 | } | |
383 | Dygraph.prototype.error = function(message) { | |
384 | this.log(Dygraph.ERROR, message); | |
385 | } | |
386 | ||
6a1aa64f DV |
387 | /** |
388 | * Returns the current rolling period, as set by the user or an option. | |
6faebb69 | 389 | * @return {Number} The number of points in the rolling window |
6a1aa64f | 390 | */ |
285a6bda | 391 | Dygraph.prototype.rollPeriod = function() { |
6a1aa64f | 392 | return this.rollPeriod_; |
76171648 DV |
393 | }; |
394 | ||
599fb4ad DV |
395 | /** |
396 | * Returns the currently-visible x-range. This can be affected by zooming, | |
397 | * panning or a call to updateOptions. | |
398 | * Returns a two-element array: [left, right]. | |
399 | * If the Dygraph has dates on the x-axis, these will be millis since epoch. | |
400 | */ | |
401 | Dygraph.prototype.xAxisRange = function() { | |
402 | if (this.dateWindow_) return this.dateWindow_; | |
403 | ||
404 | // The entire chart is visible. | |
405 | var left = this.rawData_[0][0]; | |
406 | var right = this.rawData_[this.rawData_.length - 1][0]; | |
407 | return [left, right]; | |
408 | }; | |
409 | ||
3230c662 | 410 | /** |
d58ae307 DV |
411 | * Returns the currently-visible y-range for an axis. This can be affected by |
412 | * zooming, panning or a call to updateOptions. Axis indices are zero-based. If | |
413 | * called with no arguments, returns the range of the first axis. | |
3230c662 DV |
414 | * Returns a two-element array: [bottom, top]. |
415 | */ | |
d58ae307 | 416 | Dygraph.prototype.yAxisRange = function(idx) { |
d63e6799 | 417 | if (typeof(idx) == "undefined") idx = 0; |
d58ae307 DV |
418 | if (idx < 0 || idx >= this.axes_.length) return null; |
419 | return [ this.axes_[idx].computedValueRange[0], | |
420 | this.axes_[idx].computedValueRange[1] ]; | |
421 | }; | |
422 | ||
423 | /** | |
424 | * Returns the currently-visible y-ranges for each axis. This can be affected by | |
425 | * zooming, panning, calls to updateOptions, etc. | |
426 | * Returns an array of [bottom, top] pairs, one for each y-axis. | |
427 | */ | |
428 | Dygraph.prototype.yAxisRanges = function() { | |
429 | var ret = []; | |
430 | for (var i = 0; i < this.axes_.length; i++) { | |
431 | ret.push(this.yAxisRange(i)); | |
432 | } | |
433 | return ret; | |
3230c662 DV |
434 | }; |
435 | ||
d58ae307 | 436 | // TODO(danvk): use these functions throughout dygraphs. |
3230c662 DV |
437 | /** |
438 | * Convert from data coordinates to canvas/div X/Y coordinates. | |
d58ae307 DV |
439 | * If specified, do this conversion for the coordinate system of a particular |
440 | * axis. Uses the first axis by default. | |
3230c662 | 441 | * Returns a two-element array: [X, Y] |
ff022deb | 442 | * |
0747928a | 443 | * Note: use toDomXCoord instead of toDomCoords(x, null) and use toDomYCoord |
ff022deb | 444 | * instead of toDomCoords(null, y, axis). |
3230c662 | 445 | */ |
d58ae307 | 446 | Dygraph.prototype.toDomCoords = function(x, y, axis) { |
ff022deb RK |
447 | return [ this.toDomXCoord(x), this.toDomYCoord(y, axis) ]; |
448 | }; | |
449 | ||
450 | /** | |
451 | * Convert from data x coordinates to canvas/div X coordinate. | |
452 | * If specified, do this conversion for the coordinate system of a particular | |
0037b2a4 RK |
453 | * axis. |
454 | * Returns a single value or null if x is null. | |
ff022deb RK |
455 | */ |
456 | Dygraph.prototype.toDomXCoord = function(x) { | |
457 | if (x == null) { | |
458 | return null; | |
459 | }; | |
460 | ||
3230c662 | 461 | var area = this.plotter_.area; |
ff022deb RK |
462 | var xRange = this.xAxisRange(); |
463 | return area.x + (x - xRange[0]) / (xRange[1] - xRange[0]) * area.w; | |
464 | } | |
3230c662 | 465 | |
ff022deb RK |
466 | /** |
467 | * Convert from data x coordinates to canvas/div Y coordinate and optional | |
468 | * axis. Uses the first axis by default. | |
469 | * | |
470 | * returns a single value or null if y is null. | |
471 | */ | |
472 | Dygraph.prototype.toDomYCoord = function(y, axis) { | |
0747928a | 473 | var pct = this.toPercentYCoord(y, axis); |
3230c662 | 474 | |
ff022deb RK |
475 | if (pct == null) { |
476 | return null; | |
477 | } | |
e4416fb9 | 478 | var area = this.plotter_.area; |
ff022deb RK |
479 | return area.y + pct * area.h; |
480 | } | |
3230c662 DV |
481 | |
482 | /** | |
483 | * Convert from canvas/div coords to data coordinates. | |
d58ae307 DV |
484 | * If specified, do this conversion for the coordinate system of a particular |
485 | * axis. Uses the first axis by default. | |
ff022deb RK |
486 | * Returns a two-element array: [X, Y]. |
487 | * | |
0747928a | 488 | * Note: use toDataXCoord instead of toDataCoords(x, null) and use toDataYCoord |
ff022deb | 489 | * instead of toDataCoords(null, y, axis). |
3230c662 | 490 | */ |
d58ae307 | 491 | Dygraph.prototype.toDataCoords = function(x, y, axis) { |
ff022deb RK |
492 | return [ this.toDataXCoord(x), this.toDataYCoord(y, axis) ]; |
493 | }; | |
494 | ||
495 | /** | |
496 | * Convert from canvas/div x coordinate to data coordinate. | |
497 | * | |
498 | * If x is null, this returns null. | |
499 | */ | |
500 | Dygraph.prototype.toDataXCoord = function(x) { | |
501 | if (x == null) { | |
502 | return null; | |
3230c662 DV |
503 | } |
504 | ||
ff022deb RK |
505 | var area = this.plotter_.area; |
506 | var xRange = this.xAxisRange(); | |
507 | return xRange[0] + (x - area.x) / area.w * (xRange[1] - xRange[0]); | |
508 | }; | |
509 | ||
510 | /** | |
511 | * Convert from canvas/div y coord to value. | |
512 | * | |
513 | * If y is null, this returns null. | |
514 | * if axis is null, this uses the first axis. | |
515 | */ | |
516 | Dygraph.prototype.toDataYCoord = function(y, axis) { | |
517 | if (y == null) { | |
518 | return null; | |
3230c662 DV |
519 | } |
520 | ||
ff022deb RK |
521 | var area = this.plotter_.area; |
522 | var yRange = this.yAxisRange(axis); | |
523 | ||
b70247dc RK |
524 | if (typeof(axis) == "undefined") axis = 0; |
525 | if (!this.axes_[axis].logscale) { | |
ff022deb RK |
526 | return yRange[0] + (area.h - y) / area.h * (yRange[1] - yRange[0]); |
527 | } else { | |
528 | // Computing the inverse of toDomCoord. | |
529 | var pct = (y - area.y) / area.h | |
530 | ||
531 | // Computing the inverse of toPercentYCoord. The function was arrived at with | |
532 | // the following steps: | |
533 | // | |
534 | // Original calcuation: | |
d59b6f34 | 535 | // pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); |
ff022deb RK |
536 | // |
537 | // Move denominator to both sides: | |
d59b6f34 | 538 | // pct * (logr1 - Dygraph.log10(yRange[0])) = logr1 - Dygraph.log10(y); |
ff022deb RK |
539 | // |
540 | // subtract logr1, and take the negative value. | |
d59b6f34 | 541 | // logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))) = Dygraph.log10(y); |
ff022deb RK |
542 | // |
543 | // Swap both sides of the equation, and we can compute the log of the | |
544 | // return value. Which means we just need to use that as the exponent in | |
545 | // e^exponent. | |
d59b6f34 | 546 | // Dygraph.log10(y) = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); |
ff022deb | 547 | |
d59b6f34 RK |
548 | var logr1 = Dygraph.log10(yRange[1]); |
549 | var exponent = logr1 - (pct * (logr1 - Dygraph.log10(yRange[0]))); | |
550 | var value = Math.pow(Dygraph.LOG_SCALE, exponent); | |
ff022deb RK |
551 | return value; |
552 | } | |
3230c662 DV |
553 | }; |
554 | ||
e99fde05 | 555 | /** |
ff022deb RK |
556 | * Converts a y for an axis to a percentage from the top to the |
557 | * bottom of the div. | |
558 | * | |
559 | * If the coordinate represents a value visible on the canvas, then | |
560 | * the value will be between 0 and 1, where 0 is the top of the canvas. | |
561 | * However, this method will return values outside the range, as | |
562 | * values can fall outside the canvas. | |
563 | * | |
564 | * If y is null, this returns null. | |
565 | * if axis is null, this uses the first axis. | |
566 | */ | |
567 | Dygraph.prototype.toPercentYCoord = function(y, axis) { | |
568 | if (y == null) { | |
569 | return null; | |
570 | } | |
7d0e7a0d | 571 | if (typeof(axis) == "undefined") axis = 0; |
ff022deb RK |
572 | |
573 | var area = this.plotter_.area; | |
574 | var yRange = this.yAxisRange(axis); | |
575 | ||
576 | var pct; | |
7d0e7a0d | 577 | if (!this.axes_[axis].logscale) { |
ff022deb RK |
578 | // yrange[1] - y is unit distance from the bottom. |
579 | // yrange[1] - yrange[0] is the scale of the range. | |
580 | // (yRange[1] - y) / (yRange[1] - yRange[0]) is the % from the bottom. | |
581 | pct = (yRange[1] - y) / (yRange[1] - yRange[0]); | |
582 | } else { | |
d59b6f34 RK |
583 | var logr1 = Dygraph.log10(yRange[1]); |
584 | pct = (logr1 - Dygraph.log10(y)) / (logr1 - Dygraph.log10(yRange[0])); | |
ff022deb RK |
585 | } |
586 | return pct; | |
587 | } | |
588 | ||
589 | /** | |
e99fde05 DV |
590 | * Returns the number of columns (including the independent variable). |
591 | */ | |
592 | Dygraph.prototype.numColumns = function() { | |
593 | return this.rawData_[0].length; | |
594 | }; | |
595 | ||
596 | /** | |
597 | * Returns the number of rows (excluding any header/label row). | |
598 | */ | |
599 | Dygraph.prototype.numRows = function() { | |
600 | return this.rawData_.length; | |
601 | }; | |
602 | ||
603 | /** | |
604 | * Returns the value in the given row and column. If the row and column exceed | |
605 | * the bounds on the data, returns null. Also returns null if the value is | |
606 | * missing. | |
607 | */ | |
608 | Dygraph.prototype.getValue = function(row, col) { | |
609 | if (row < 0 || row > this.rawData_.length) return null; | |
610 | if (col < 0 || col > this.rawData_[row].length) return null; | |
611 | ||
612 | return this.rawData_[row][col]; | |
613 | }; | |
614 | ||
76171648 DV |
615 | Dygraph.addEvent = function(el, evt, fn) { |
616 | var normed_fn = function(e) { | |
617 | if (!e) var e = window.event; | |
618 | fn(e); | |
619 | }; | |
620 | if (window.addEventListener) { // Mozilla, Netscape, Firefox | |
621 | el.addEventListener(evt, normed_fn, false); | |
622 | } else { // IE | |
623 | el.attachEvent('on' + evt, normed_fn); | |
624 | } | |
625 | }; | |
6a1aa64f | 626 | |
062ef401 JB |
627 | |
628 | // Based on the article at | |
629 | // http://www.switchonthecode.com/tutorials/javascript-tutorial-the-scroll-wheel | |
630 | Dygraph.cancelEvent = function(e) { | |
631 | e = e ? e : window.event; | |
632 | if (e.stopPropagation) { | |
633 | e.stopPropagation(); | |
634 | } | |
635 | if (e.preventDefault) { | |
636 | e.preventDefault(); | |
637 | } | |
638 | e.cancelBubble = true; | |
639 | e.cancel = true; | |
640 | e.returnValue = false; | |
641 | return false; | |
642 | } | |
643 | ||
644 | ||
6a1aa64f | 645 | /** |
285a6bda | 646 | * Generates interface elements for the Dygraph: a containing div, a div to |
6a1aa64f | 647 | * display the current point, and a textbox to adjust the rolling average |
697e70b2 | 648 | * period. Also creates the Renderer/Layout elements. |
6a1aa64f DV |
649 | * @private |
650 | */ | |
285a6bda | 651 | Dygraph.prototype.createInterface_ = function() { |
6a1aa64f DV |
652 | // Create the all-enclosing graph div |
653 | var enclosing = this.maindiv_; | |
654 | ||
b0c3b730 DV |
655 | this.graphDiv = document.createElement("div"); |
656 | this.graphDiv.style.width = this.width_ + "px"; | |
657 | this.graphDiv.style.height = this.height_ + "px"; | |
658 | enclosing.appendChild(this.graphDiv); | |
659 | ||
660 | // Create the canvas for interactive parts of the chart. | |
f8cfec73 | 661 | this.canvas_ = Dygraph.createCanvas(); |
b0c3b730 DV |
662 | this.canvas_.style.position = "absolute"; |
663 | this.canvas_.width = this.width_; | |
664 | this.canvas_.height = this.height_; | |
f8cfec73 DV |
665 | this.canvas_.style.width = this.width_ + "px"; // for IE |
666 | this.canvas_.style.height = this.height_ + "px"; // for IE | |
b0c3b730 DV |
667 | |
668 | // ... and for static parts of the chart. | |
6a1aa64f | 669 | this.hidden_ = this.createPlotKitCanvas_(this.canvas_); |
76171648 | 670 | |
eb7bf005 EC |
671 | // The interactive parts of the graph are drawn on top of the chart. |
672 | this.graphDiv.appendChild(this.hidden_); | |
673 | this.graphDiv.appendChild(this.canvas_); | |
674 | this.mouseEventElement_ = this.canvas_; | |
675 | ||
76171648 | 676 | var dygraph = this; |
eb7bf005 | 677 | Dygraph.addEvent(this.mouseEventElement_, 'mousemove', function(e) { |
76171648 DV |
678 | dygraph.mouseMove_(e); |
679 | }); | |
eb7bf005 | 680 | Dygraph.addEvent(this.mouseEventElement_, 'mouseout', function(e) { |
76171648 DV |
681 | dygraph.mouseOut_(e); |
682 | }); | |
697e70b2 DV |
683 | |
684 | // Create the grapher | |
685 | // TODO(danvk): why does the Layout need its own set of options? | |
686 | this.layoutOptions_ = { 'xOriginIsZero': false }; | |
687 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
688 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
689 | Dygraph.update(this.layoutOptions_, { | |
690 | 'errorBars': (this.attr_("errorBars") || this.attr_("customBars")) }); | |
691 | ||
692 | this.layout_ = new DygraphLayout(this, this.layoutOptions_); | |
693 | ||
694 | // TODO(danvk): why does the Renderer need its own set of options? | |
695 | this.renderOptions_ = { colorScheme: this.colors_, | |
696 | strokeColor: null, | |
697 | axisLineWidth: Dygraph.AXIS_LINE_WIDTH }; | |
698 | Dygraph.update(this.renderOptions_, this.attrs_); | |
699 | Dygraph.update(this.renderOptions_, this.user_attrs_); | |
697e70b2 DV |
700 | |
701 | this.createStatusMessage_(); | |
697e70b2 | 702 | this.createDragInterface_(); |
4cfcc38c DV |
703 | }; |
704 | ||
705 | /** | |
706 | * Detach DOM elements in the dygraph and null out all data references. | |
707 | * Calling this when you're done with a dygraph can dramatically reduce memory | |
708 | * usage. See, e.g., the tests/perf.html example. | |
709 | */ | |
710 | Dygraph.prototype.destroy = function() { | |
711 | var removeRecursive = function(node) { | |
712 | while (node.hasChildNodes()) { | |
713 | removeRecursive(node.firstChild); | |
714 | node.removeChild(node.firstChild); | |
715 | } | |
716 | }; | |
717 | removeRecursive(this.maindiv_); | |
718 | ||
719 | var nullOut = function(obj) { | |
720 | for (var n in obj) { | |
721 | if (typeof(obj[n]) === 'object') { | |
722 | obj[n] = null; | |
723 | } | |
724 | } | |
725 | }; | |
726 | ||
727 | // These may not all be necessary, but it can't hurt... | |
728 | nullOut(this.layout_); | |
729 | nullOut(this.plotter_); | |
730 | nullOut(this); | |
731 | }; | |
6a1aa64f DV |
732 | |
733 | /** | |
734 | * Creates the canvas containing the PlotKit graph. Only plotkit ever draws on | |
285a6bda | 735 | * this particular canvas. All Dygraph work is done on this.canvas_. |
8846615a | 736 | * @param {Object} canvas The Dygraph canvas over which to overlay the plot |
6a1aa64f DV |
737 | * @return {Object} The newly-created canvas |
738 | * @private | |
739 | */ | |
285a6bda | 740 | Dygraph.prototype.createPlotKitCanvas_ = function(canvas) { |
f8cfec73 | 741 | var h = Dygraph.createCanvas(); |
6a1aa64f | 742 | h.style.position = "absolute"; |
9ac5e4ae DV |
743 | // TODO(danvk): h should be offset from canvas. canvas needs to include |
744 | // some extra area to make it easier to zoom in on the far left and far | |
745 | // right. h needs to be precisely the plot area, so that clipping occurs. | |
6a1aa64f DV |
746 | h.style.top = canvas.style.top; |
747 | h.style.left = canvas.style.left; | |
748 | h.width = this.width_; | |
749 | h.height = this.height_; | |
f8cfec73 DV |
750 | h.style.width = this.width_ + "px"; // for IE |
751 | h.style.height = this.height_ + "px"; // for IE | |
6a1aa64f DV |
752 | return h; |
753 | }; | |
754 | ||
f474c2a3 DV |
755 | // Taken from MochiKit.Color |
756 | Dygraph.hsvToRGB = function (hue, saturation, value) { | |
757 | var red; | |
758 | var green; | |
759 | var blue; | |
760 | if (saturation === 0) { | |
761 | red = value; | |
762 | green = value; | |
763 | blue = value; | |
764 | } else { | |
765 | var i = Math.floor(hue * 6); | |
766 | var f = (hue * 6) - i; | |
767 | var p = value * (1 - saturation); | |
768 | var q = value * (1 - (saturation * f)); | |
769 | var t = value * (1 - (saturation * (1 - f))); | |
770 | switch (i) { | |
771 | case 1: red = q; green = value; blue = p; break; | |
772 | case 2: red = p; green = value; blue = t; break; | |
773 | case 3: red = p; green = q; blue = value; break; | |
774 | case 4: red = t; green = p; blue = value; break; | |
775 | case 5: red = value; green = p; blue = q; break; | |
776 | case 6: // fall through | |
777 | case 0: red = value; green = t; blue = p; break; | |
778 | } | |
779 | } | |
780 | red = Math.floor(255 * red + 0.5); | |
781 | green = Math.floor(255 * green + 0.5); | |
782 | blue = Math.floor(255 * blue + 0.5); | |
783 | return 'rgb(' + red + ',' + green + ',' + blue + ')'; | |
784 | }; | |
785 | ||
786 | ||
6a1aa64f DV |
787 | /** |
788 | * Generate a set of distinct colors for the data series. This is done with a | |
789 | * color wheel. Saturation/Value are customizable, and the hue is | |
790 | * equally-spaced around the color wheel. If a custom set of colors is | |
791 | * specified, that is used instead. | |
6a1aa64f DV |
792 | * @private |
793 | */ | |
285a6bda DV |
794 | Dygraph.prototype.setColors_ = function() { |
795 | // TODO(danvk): compute this directly into this.attrs_['colorScheme'] and do | |
796 | // away with this.renderOptions_. | |
797 | var num = this.attr_("labels").length - 1; | |
6a1aa64f | 798 | this.colors_ = []; |
285a6bda DV |
799 | var colors = this.attr_('colors'); |
800 | if (!colors) { | |
801 | var sat = this.attr_('colorSaturation') || 1.0; | |
802 | var val = this.attr_('colorValue') || 0.5; | |
2aa21213 | 803 | var half = Math.ceil(num / 2); |
6a1aa64f | 804 | for (var i = 1; i <= num; i++) { |
ec1959eb | 805 | if (!this.visibility()[i-1]) continue; |
43af96e7 | 806 | // alternate colors for high contrast. |
2aa21213 | 807 | var idx = i % 2 ? Math.ceil(i / 2) : (half + i / 2); |
43af96e7 NK |
808 | var hue = (1.0 * idx/ (1 + num)); |
809 | this.colors_.push(Dygraph.hsvToRGB(hue, sat, val)); | |
6a1aa64f DV |
810 | } |
811 | } else { | |
812 | for (var i = 0; i < num; i++) { | |
ec1959eb | 813 | if (!this.visibility()[i]) continue; |
285a6bda | 814 | var colorStr = colors[i % colors.length]; |
f474c2a3 | 815 | this.colors_.push(colorStr); |
6a1aa64f DV |
816 | } |
817 | } | |
285a6bda | 818 | |
c21d2c2d | 819 | // TODO(danvk): update this w/r/t/ the new options system. |
285a6bda | 820 | this.renderOptions_.colorScheme = this.colors_; |
fc80a396 DV |
821 | Dygraph.update(this.plotter_.options, this.renderOptions_); |
822 | Dygraph.update(this.layoutOptions_, this.user_attrs_); | |
823 | Dygraph.update(this.layoutOptions_, this.attrs_); | |
6a1aa64f DV |
824 | } |
825 | ||
43af96e7 NK |
826 | /** |
827 | * Return the list of colors. This is either the list of colors passed in the | |
828 | * attributes, or the autogenerated list of rgb(r,g,b) strings. | |
829 | * @return {Array<string>} The list of colors. | |
830 | */ | |
831 | Dygraph.prototype.getColors = function() { | |
832 | return this.colors_; | |
833 | }; | |
834 | ||
5e60386d DV |
835 | // The following functions are from quirksmode.org with a modification for Safari from |
836 | // http://blog.firetree.net/2005/07/04/javascript-find-position/ | |
3df0ccf0 DV |
837 | // http://www.quirksmode.org/js/findpos.html |
838 | Dygraph.findPosX = function(obj) { | |
839 | var curleft = 0; | |
5e60386d | 840 | if(obj.offsetParent) |
50360fd0 | 841 | while(1) |
5e60386d | 842 | { |
3df0ccf0 | 843 | curleft += obj.offsetLeft; |
5e60386d DV |
844 | if(!obj.offsetParent) |
845 | break; | |
3df0ccf0 DV |
846 | obj = obj.offsetParent; |
847 | } | |
5e60386d | 848 | else if(obj.x) |
3df0ccf0 DV |
849 | curleft += obj.x; |
850 | return curleft; | |
851 | }; | |
c21d2c2d | 852 | |
3df0ccf0 DV |
853 | Dygraph.findPosY = function(obj) { |
854 | var curtop = 0; | |
5e60386d DV |
855 | if(obj.offsetParent) |
856 | while(1) | |
857 | { | |
3df0ccf0 | 858 | curtop += obj.offsetTop; |
5e60386d DV |
859 | if(!obj.offsetParent) |
860 | break; | |
3df0ccf0 DV |
861 | obj = obj.offsetParent; |
862 | } | |
5e60386d | 863 | else if(obj.y) |
3df0ccf0 DV |
864 | curtop += obj.y; |
865 | return curtop; | |
866 | }; | |
867 | ||
5e60386d | 868 | |
71a11a8e | 869 | |
6a1aa64f DV |
870 | /** |
871 | * Create the div that contains information on the selected point(s) | |
872 | * This goes in the top right of the canvas, unless an external div has already | |
873 | * been specified. | |
874 | * @private | |
875 | */ | |
fedbd797 | 876 | Dygraph.prototype.createStatusMessage_ = function() { |
877 | var userLabelsDiv = this.user_attrs_["labelsDiv"]; | |
878 | if (userLabelsDiv && null != userLabelsDiv | |
879 | && (typeof(userLabelsDiv) == "string" || userLabelsDiv instanceof String)) { | |
880 | this.user_attrs_["labelsDiv"] = document.getElementById(userLabelsDiv); | |
881 | } | |
285a6bda DV |
882 | if (!this.attr_("labelsDiv")) { |
883 | var divWidth = this.attr_('labelsDivWidth'); | |
b0c3b730 | 884 | var messagestyle = { |
6a1aa64f DV |
885 | "position": "absolute", |
886 | "fontSize": "14px", | |
887 | "zIndex": 10, | |
888 | "width": divWidth + "px", | |
889 | "top": "0px", | |
8846615a | 890 | "left": (this.width_ - divWidth - 2) + "px", |
6a1aa64f DV |
891 | "background": "white", |
892 | "textAlign": "left", | |
b0c3b730 | 893 | "overflow": "hidden"}; |
fc80a396 | 894 | Dygraph.update(messagestyle, this.attr_('labelsDivStyles')); |
b0c3b730 DV |
895 | var div = document.createElement("div"); |
896 | for (var name in messagestyle) { | |
85b99f0b DV |
897 | if (messagestyle.hasOwnProperty(name)) { |
898 | div.style[name] = messagestyle[name]; | |
899 | } | |
b0c3b730 DV |
900 | } |
901 | this.graphDiv.appendChild(div); | |
285a6bda | 902 | this.attrs_.labelsDiv = div; |
6a1aa64f DV |
903 | } |
904 | }; | |
905 | ||
906 | /** | |
0abfbd7e DV |
907 | * Position the labels div so that its right edge is flush with the right edge |
908 | * of the charting area. | |
909 | */ | |
910 | Dygraph.prototype.positionLabelsDiv_ = function() { | |
911 | // Don't touch a user-specified labelsDiv. | |
912 | if (this.user_attrs_.hasOwnProperty("labelsDiv")) return; | |
913 | ||
914 | var area = this.plotter_.area; | |
915 | var div = this.attr_("labelsDiv"); | |
8c21adcf | 916 | div.style.left = area.x + area.w - this.attr_("labelsDivWidth") - 1 + "px"; |
0abfbd7e DV |
917 | }; |
918 | ||
919 | /** | |
6a1aa64f | 920 | * Create the text box to adjust the averaging period |
6a1aa64f DV |
921 | * @private |
922 | */ | |
285a6bda | 923 | Dygraph.prototype.createRollInterface_ = function() { |
8c69de65 DV |
924 | // Create a roller if one doesn't exist already. |
925 | if (!this.roller_) { | |
926 | this.roller_ = document.createElement("input"); | |
927 | this.roller_.type = "text"; | |
928 | this.roller_.style.display = "none"; | |
929 | this.graphDiv.appendChild(this.roller_); | |
930 | } | |
931 | ||
932 | var display = this.attr_('showRoller') ? 'block' : 'none'; | |
26ca7938 | 933 | |
b0c3b730 DV |
934 | var textAttr = { "position": "absolute", |
935 | "zIndex": 10, | |
936 | "top": (this.plotter_.area.h - 25) + "px", | |
937 | "left": (this.plotter_.area.x + 1) + "px", | |
938 | "display": display | |
6a1aa64f | 939 | }; |
8c69de65 DV |
940 | this.roller_.size = "2"; |
941 | this.roller_.value = this.rollPeriod_; | |
b0c3b730 | 942 | for (var name in textAttr) { |
85b99f0b | 943 | if (textAttr.hasOwnProperty(name)) { |
8c69de65 | 944 | this.roller_.style[name] = textAttr[name]; |
85b99f0b | 945 | } |
b0c3b730 DV |
946 | } |
947 | ||
76171648 | 948 | var dygraph = this; |
8c69de65 | 949 | this.roller_.onchange = function() { dygraph.adjustRoll(dygraph.roller_.value); }; |
76171648 DV |
950 | }; |
951 | ||
952 | // These functions are taken from MochiKit.Signal | |
953 | Dygraph.pageX = function(e) { | |
954 | if (e.pageX) { | |
955 | return (!e.pageX || e.pageX < 0) ? 0 : e.pageX; | |
956 | } else { | |
957 | var de = document; | |
958 | var b = document.body; | |
959 | return e.clientX + | |
960 | (de.scrollLeft || b.scrollLeft) - | |
961 | (de.clientLeft || 0); | |
962 | } | |
963 | }; | |
964 | ||
965 | Dygraph.pageY = function(e) { | |
966 | if (e.pageY) { | |
967 | return (!e.pageY || e.pageY < 0) ? 0 : e.pageY; | |
968 | } else { | |
969 | var de = document; | |
970 | var b = document.body; | |
971 | return e.clientY + | |
972 | (de.scrollTop || b.scrollTop) - | |
973 | (de.clientTop || 0); | |
974 | } | |
975 | }; | |
6a1aa64f | 976 | |
062ef401 JB |
977 | Dygraph.prototype.dragGetX_ = function(e, context) { |
978 | return Dygraph.pageX(e) - context.px | |
979 | }; | |
bce01b0f | 980 | |
062ef401 JB |
981 | Dygraph.prototype.dragGetY_ = function(e, context) { |
982 | return Dygraph.pageY(e) - context.py | |
983 | }; | |
ee672584 | 984 | |
062ef401 JB |
985 | // Called in response to an interaction model operation that |
986 | // should start the default panning behavior. | |
987 | // | |
988 | // It's used in the default callback for "mousedown" operations. | |
989 | // Custom interaction model builders can use it to provide the default | |
990 | // panning behavior. | |
991 | // | |
992 | Dygraph.startPan = function(event, g, context) { | |
062ef401 JB |
993 | context.isPanning = true; |
994 | var xRange = g.xAxisRange(); | |
995 | context.dateRange = xRange[1] - xRange[0]; | |
ec291cbe RK |
996 | context.initialLeftmostDate = xRange[0]; |
997 | context.xUnitsPerPixel = context.dateRange / (g.plotter_.area.w - 1); | |
062ef401 JB |
998 | |
999 | // Record the range of each y-axis at the start of the drag. | |
1000 | // If any axis has a valueRange or valueWindow, then we want a 2D pan. | |
1001 | context.is2DPan = false; | |
1002 | for (var i = 0; i < g.axes_.length; i++) { | |
1003 | var axis = g.axes_[i]; | |
1004 | var yRange = g.yAxisRange(i); | |
ec291cbe | 1005 | // TODO(konigsberg): These values should be in |context|. |
ed898bdd RK |
1006 | // In log scale, initialTopValue, dragValueRange and unitsPerPixel are log scale. |
1007 | if (axis.logscale) { | |
1008 | axis.initialTopValue = Dygraph.log10(yRange[1]); | |
1009 | axis.dragValueRange = Dygraph.log10(yRange[1]) - Dygraph.log10(yRange[0]); | |
1010 | } else { | |
1011 | axis.initialTopValue = yRange[1]; | |
1012 | axis.dragValueRange = yRange[1] - yRange[0]; | |
1013 | } | |
ec291cbe | 1014 | axis.unitsPerPixel = axis.dragValueRange / (g.plotter_.area.h - 1); |
ed898bdd RK |
1015 | |
1016 | // While calculating axes, set 2dpan. | |
062ef401 JB |
1017 | if (axis.valueWindow || axis.valueRange) context.is2DPan = true; |
1018 | } | |
062ef401 | 1019 | }; |
6a1aa64f | 1020 | |
062ef401 JB |
1021 | // Called in response to an interaction model operation that |
1022 | // responds to an event that pans the view. | |
1023 | // | |
1024 | // It's used in the default callback for "mousemove" operations. | |
1025 | // Custom interaction model builders can use it to provide the default | |
1026 | // panning behavior. | |
1027 | // | |
1028 | Dygraph.movePan = function(event, g, context) { | |
1029 | context.dragEndX = g.dragGetX_(event, context); | |
1030 | context.dragEndY = g.dragGetY_(event, context); | |
79b3ee42 | 1031 | |
ec291cbe RK |
1032 | var minDate = context.initialLeftmostDate - |
1033 | (context.dragEndX - context.dragStartX) * context.xUnitsPerPixel; | |
062ef401 JB |
1034 | var maxDate = minDate + context.dateRange; |
1035 | g.dateWindow_ = [minDate, maxDate]; | |
1036 | ||
1037 | // y-axis scaling is automatic unless this is a full 2D pan. | |
1038 | if (context.is2DPan) { | |
1039 | // Adjust each axis appropriately. | |
062ef401 JB |
1040 | for (var i = 0; i < g.axes_.length; i++) { |
1041 | var axis = g.axes_[i]; | |
ed898bdd RK |
1042 | |
1043 | var pixelsDragged = context.dragEndY - context.dragStartY; | |
1044 | var unitsDragged = pixelsDragged * axis.unitsPerPixel; | |
1045 | ||
1046 | // In log scale, maxValue and minValue are the logs of those values. | |
1047 | var maxValue = axis.initialTopValue + unitsDragged; | |
062ef401 | 1048 | var minValue = maxValue - axis.dragValueRange; |
ed898bdd | 1049 | if (axis.logscale) { |
5db0e241 DV |
1050 | axis.valueWindow = [ Math.pow(Dygraph.LOG_SCALE, minValue), |
1051 | Math.pow(Dygraph.LOG_SCALE, maxValue) ]; | |
ed898bdd RK |
1052 | } else { |
1053 | axis.valueWindow = [ minValue, maxValue ]; | |
1054 | } | |
6faebb69 | 1055 | } |
062ef401 | 1056 | } |
bce01b0f | 1057 | |
062ef401 JB |
1058 | g.drawGraph_(); |
1059 | } | |
ee672584 | 1060 | |
062ef401 JB |
1061 | // Called in response to an interaction model operation that |
1062 | // responds to an event that ends panning. | |
1063 | // | |
1064 | // It's used in the default callback for "mouseup" operations. | |
1065 | // Custom interaction model builders can use it to provide the default | |
1066 | // panning behavior. | |
1067 | // | |
1068 | Dygraph.endPan = function(event, g, context) { | |
ec291cbe RK |
1069 | // TODO(konigsberg): Clear the context data from the axis. |
1070 | // TODO(konigsberg): mouseup should just delete the | |
1071 | // context object, and mousedown should create a new one. | |
062ef401 JB |
1072 | context.isPanning = false; |
1073 | context.is2DPan = false; | |
ec291cbe | 1074 | context.initialLeftmostDate = null; |
062ef401 JB |
1075 | context.dateRange = null; |
1076 | context.valueRange = null; | |
1077 | } | |
ee672584 | 1078 | |
062ef401 JB |
1079 | // Called in response to an interaction model operation that |
1080 | // responds to an event that starts zooming. | |
1081 | // | |
1082 | // It's used in the default callback for "mousedown" operations. | |
1083 | // Custom interaction model builders can use it to provide the default | |
1084 | // zooming behavior. | |
1085 | // | |
1086 | Dygraph.startZoom = function(event, g, context) { | |
1087 | context.isZooming = true; | |
1088 | } | |
1089 | ||
1090 | // Called in response to an interaction model operation that | |
1091 | // responds to an event that defines zoom boundaries. | |
1092 | // | |
1093 | // It's used in the default callback for "mousemove" operations. | |
1094 | // Custom interaction model builders can use it to provide the default | |
1095 | // zooming behavior. | |
1096 | // | |
1097 | Dygraph.moveZoom = function(event, g, context) { | |
1098 | context.dragEndX = g.dragGetX_(event, context); | |
1099 | context.dragEndY = g.dragGetY_(event, context); | |
1100 | ||
1101 | var xDelta = Math.abs(context.dragStartX - context.dragEndX); | |
1102 | var yDelta = Math.abs(context.dragStartY - context.dragEndY); | |
1103 | ||
1104 | // drag direction threshold for y axis is twice as large as x axis | |
1105 | context.dragDirection = (xDelta < yDelta / 2) ? Dygraph.VERTICAL : Dygraph.HORIZONTAL; | |
1106 | ||
1107 | g.drawZoomRect_( | |
1108 | context.dragDirection, | |
1109 | context.dragStartX, | |
1110 | context.dragEndX, | |
1111 | context.dragStartY, | |
1112 | context.dragEndY, | |
1113 | context.prevDragDirection, | |
1114 | context.prevEndX, | |
1115 | context.prevEndY); | |
1116 | ||
1117 | context.prevEndX = context.dragEndX; | |
1118 | context.prevEndY = context.dragEndY; | |
1119 | context.prevDragDirection = context.dragDirection; | |
1120 | } | |
1121 | ||
1122 | // Called in response to an interaction model operation that | |
1123 | // responds to an event that performs a zoom based on previously defined | |
1124 | // bounds.. | |
1125 | // | |
1126 | // It's used in the default callback for "mouseup" operations. | |
1127 | // Custom interaction model builders can use it to provide the default | |
1128 | // zooming behavior. | |
1129 | // | |
1130 | Dygraph.endZoom = function(event, g, context) { | |
1131 | context.isZooming = false; | |
1132 | context.dragEndX = g.dragGetX_(event, context); | |
1133 | context.dragEndY = g.dragGetY_(event, context); | |
1134 | var regionWidth = Math.abs(context.dragEndX - context.dragStartX); | |
1135 | var regionHeight = Math.abs(context.dragEndY - context.dragStartY); | |
1136 | ||
1137 | if (regionWidth < 2 && regionHeight < 2 && | |
1138 | g.lastx_ != undefined && g.lastx_ != -1) { | |
1139 | // TODO(danvk): pass along more info about the points, e.g. 'x' | |
1140 | if (g.attr_('clickCallback') != null) { | |
1141 | g.attr_('clickCallback')(event, g.lastx_, g.selPoints_); | |
1142 | } | |
1143 | if (g.attr_('pointClickCallback')) { | |
1144 | // check if the click was on a particular point. | |
1145 | var closestIdx = -1; | |
1146 | var closestDistance = 0; | |
1147 | for (var i = 0; i < g.selPoints_.length; i++) { | |
1148 | var p = g.selPoints_[i]; | |
1149 | var distance = Math.pow(p.canvasx - context.dragEndX, 2) + | |
1150 | Math.pow(p.canvasy - context.dragEndY, 2); | |
1151 | if (closestIdx == -1 || distance < closestDistance) { | |
1152 | closestDistance = distance; | |
1153 | closestIdx = i; | |
d58ae307 DV |
1154 | } |
1155 | } | |
e3489f4f | 1156 | |
062ef401 JB |
1157 | // Allow any click within two pixels of the dot. |
1158 | var radius = g.attr_('highlightCircleSize') + 2; | |
1159 | if (closestDistance <= 5 * 5) { | |
1160 | g.attr_('pointClickCallback')(event, g.selPoints_[closestIdx]); | |
6faebb69 | 1161 | } |
062ef401 JB |
1162 | } |
1163 | } | |
0a52ab7a | 1164 | |
062ef401 JB |
1165 | if (regionWidth >= 10 && context.dragDirection == Dygraph.HORIZONTAL) { |
1166 | g.doZoomX_(Math.min(context.dragStartX, context.dragEndX), | |
1167 | Math.max(context.dragStartX, context.dragEndX)); | |
1168 | } else if (regionHeight >= 10 && context.dragDirection == Dygraph.VERTICAL) { | |
1169 | g.doZoomY_(Math.min(context.dragStartY, context.dragEndY), | |
1170 | Math.max(context.dragStartY, context.dragEndY)); | |
1171 | } else { | |
1172 | g.canvas_.getContext("2d").clearRect(0, 0, | |
1173 | g.canvas_.width, | |
1174 | g.canvas_.height); | |
1175 | } | |
1176 | context.dragStartX = null; | |
1177 | context.dragStartY = null; | |
1178 | } | |
1179 | ||
1180 | Dygraph.defaultInteractionModel = { | |
1181 | // Track the beginning of drag events | |
1182 | mousedown: function(event, g, context) { | |
1183 | context.initializeMouseDown(event, g, context); | |
1184 | ||
1185 | if (event.altKey || event.shiftKey) { | |
1186 | Dygraph.startPan(event, g, context); | |
bce01b0f | 1187 | } else { |
062ef401 | 1188 | Dygraph.startZoom(event, g, context); |
bce01b0f | 1189 | } |
062ef401 | 1190 | }, |
6a1aa64f | 1191 | |
062ef401 JB |
1192 | // Draw zoom rectangles when the mouse is down and the user moves around |
1193 | mousemove: function(event, g, context) { | |
1194 | if (context.isZooming) { | |
1195 | Dygraph.moveZoom(event, g, context); | |
1196 | } else if (context.isPanning) { | |
1197 | Dygraph.movePan(event, g, context); | |
6a1aa64f | 1198 | } |
062ef401 | 1199 | }, |
bce01b0f | 1200 | |
062ef401 JB |
1201 | mouseup: function(event, g, context) { |
1202 | if (context.isZooming) { | |
1203 | Dygraph.endZoom(event, g, context); | |
1204 | } else if (context.isPanning) { | |
1205 | Dygraph.endPan(event, g, context); | |
bce01b0f | 1206 | } |
062ef401 | 1207 | }, |
6a1aa64f DV |
1208 | |
1209 | // Temporarily cancel the dragging event when the mouse leaves the graph | |
062ef401 JB |
1210 | mouseout: function(event, g, context) { |
1211 | if (context.isZooming) { | |
1212 | context.dragEndX = null; | |
1213 | context.dragEndY = null; | |
6a1aa64f | 1214 | } |
062ef401 | 1215 | }, |
6a1aa64f | 1216 | |
062ef401 JB |
1217 | // Disable zooming out if panning. |
1218 | dblclick: function(event, g, context) { | |
1219 | if (event.altKey || event.shiftKey) { | |
1220 | return; | |
1221 | } | |
1222 | // TODO(konigsberg): replace g.doUnzoom()_ with something that is | |
1223 | // friendlier to public use. | |
1224 | g.doUnzoom_(); | |
1225 | } | |
1226 | }; | |
1e1bf7df | 1227 | |
062ef401 | 1228 | Dygraph.DEFAULT_ATTRS.interactionModel = Dygraph.defaultInteractionModel; |
6a1aa64f | 1229 | |
062ef401 JB |
1230 | /** |
1231 | * Set up all the mouse handlers needed to capture dragging behavior for zoom | |
1232 | * events. | |
1233 | * @private | |
1234 | */ | |
1235 | Dygraph.prototype.createDragInterface_ = function() { | |
1236 | var context = { | |
1237 | // Tracks whether the mouse is down right now | |
1238 | isZooming: false, | |
1239 | isPanning: false, // is this drag part of a pan? | |
1240 | is2DPan: false, // if so, is that pan 1- or 2-dimensional? | |
1241 | dragStartX: null, | |
1242 | dragStartY: null, | |
1243 | dragEndX: null, | |
1244 | dragEndY: null, | |
1245 | dragDirection: null, | |
1246 | prevEndX: null, | |
1247 | prevEndY: null, | |
1248 | prevDragDirection: null, | |
1249 | ||
ec291cbe RK |
1250 | // The value on the left side of the graph when a pan operation starts. |
1251 | initialLeftmostDate: null, | |
1252 | ||
1253 | // The number of units each pixel spans. (This won't be valid for log | |
1254 | // scales) | |
1255 | xUnitsPerPixel: null, | |
062ef401 JB |
1256 | |
1257 | // TODO(danvk): update this comment | |
1258 | // The range in second/value units that the viewport encompasses during a | |
1259 | // panning operation. | |
1260 | dateRange: null, | |
1261 | ||
1262 | // Utility function to convert page-wide coordinates to canvas coords | |
1263 | px: 0, | |
1264 | py: 0, | |
1265 | ||
1266 | initializeMouseDown: function(event, g, context) { | |
1267 | // prevents mouse drags from selecting page text. | |
1268 | if (event.preventDefault) { | |
1269 | event.preventDefault(); // Firefox, Chrome, etc. | |
6a1aa64f | 1270 | } else { |
062ef401 JB |
1271 | event.returnValue = false; // IE |
1272 | event.cancelBubble = true; | |
6a1aa64f DV |
1273 | } |
1274 | ||
062ef401 JB |
1275 | context.px = Dygraph.findPosX(g.canvas_); |
1276 | context.py = Dygraph.findPosY(g.canvas_); | |
1277 | context.dragStartX = g.dragGetX_(event, context); | |
1278 | context.dragStartY = g.dragGetY_(event, context); | |
6a1aa64f | 1279 | } |
062ef401 | 1280 | }; |
2b188b3d | 1281 | |
062ef401 | 1282 | var interactionModel = this.attr_("interactionModel"); |
8b83c6cc | 1283 | |
062ef401 JB |
1284 | // Self is the graph. |
1285 | var self = this; | |
6faebb69 | 1286 | |
062ef401 JB |
1287 | // Function that binds the graph and context to the handler. |
1288 | var bindHandler = function(handler) { | |
1289 | return function(event) { | |
1290 | handler(event, self, context); | |
1291 | }; | |
1292 | }; | |
1293 | ||
1294 | for (var eventName in interactionModel) { | |
1295 | if (!interactionModel.hasOwnProperty(eventName)) continue; | |
1296 | Dygraph.addEvent(this.mouseEventElement_, eventName, | |
1297 | bindHandler(interactionModel[eventName])); | |
1298 | } | |
1299 | ||
1300 | // If the user releases the mouse button during a drag, but not over the | |
1301 | // canvas, then it doesn't count as a zooming action. | |
1302 | Dygraph.addEvent(document, 'mouseup', function(event) { | |
1303 | if (context.isZooming || context.isPanning) { | |
1304 | context.isZooming = false; | |
1305 | context.dragStartX = null; | |
1306 | context.dragStartY = null; | |
1307 | } | |
1308 | ||
1309 | if (context.isPanning) { | |
1310 | context.isPanning = false; | |
1311 | context.draggingDate = null; | |
1312 | context.dateRange = null; | |
1313 | for (var i = 0; i < self.axes_.length; i++) { | |
1314 | delete self.axes_[i].draggingValue; | |
1315 | delete self.axes_[i].dragValueRange; | |
1316 | } | |
1317 | } | |
6a1aa64f DV |
1318 | }); |
1319 | }; | |
1320 | ||
062ef401 | 1321 | |
6a1aa64f DV |
1322 | /** |
1323 | * Draw a gray zoom rectangle over the desired area of the canvas. Also clears | |
1324 | * up any previous zoom rectangles that were drawn. This could be optimized to | |
1325 | * avoid extra redrawing, but it's tricky to avoid interactions with the status | |
1326 | * dots. | |
8b83c6cc | 1327 | * |
39b0e098 RK |
1328 | * @param {Number} direction the direction of the zoom rectangle. Acceptable |
1329 | * values are Dygraph.HORIZONTAL and Dygraph.VERTICAL. | |
6a1aa64f DV |
1330 | * @param {Number} startX The X position where the drag started, in canvas |
1331 | * coordinates. | |
1332 | * @param {Number} endX The current X position of the drag, in canvas coords. | |
8b83c6cc RK |
1333 | * @param {Number} startY The Y position where the drag started, in canvas |
1334 | * coordinates. | |
1335 | * @param {Number} endY The current Y position of the drag, in canvas coords. | |
39b0e098 | 1336 | * @param {Number} prevDirection the value of direction on the previous call to |
8b83c6cc | 1337 | * this function. Used to avoid excess redrawing |
6a1aa64f DV |
1338 | * @param {Number} prevEndX The value of endX on the previous call to this |
1339 | * function. Used to avoid excess redrawing | |
8b83c6cc RK |
1340 | * @param {Number} prevEndY The value of endY on the previous call to this |
1341 | * function. Used to avoid excess redrawing | |
6a1aa64f DV |
1342 | * @private |
1343 | */ | |
7201b11e JB |
1344 | Dygraph.prototype.drawZoomRect_ = function(direction, startX, endX, startY, |
1345 | endY, prevDirection, prevEndX, | |
1346 | prevEndY) { | |
6a1aa64f DV |
1347 | var ctx = this.canvas_.getContext("2d"); |
1348 | ||
1349 | // Clean up from the previous rect if necessary | |
39b0e098 | 1350 | if (prevDirection == Dygraph.HORIZONTAL) { |
6a1aa64f DV |
1351 | ctx.clearRect(Math.min(startX, prevEndX), 0, |
1352 | Math.abs(startX - prevEndX), this.height_); | |
39b0e098 | 1353 | } else if (prevDirection == Dygraph.VERTICAL){ |
8b83c6cc RK |
1354 | ctx.clearRect(0, Math.min(startY, prevEndY), |
1355 | this.width_, Math.abs(startY - prevEndY)); | |
6a1aa64f DV |
1356 | } |
1357 | ||
1358 | // Draw a light-grey rectangle to show the new viewing area | |
39b0e098 | 1359 | if (direction == Dygraph.HORIZONTAL) { |
8b83c6cc RK |
1360 | if (endX && startX) { |
1361 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1362 | ctx.fillRect(Math.min(startX, endX), 0, | |
1363 | Math.abs(endX - startX), this.height_); | |
1364 | } | |
1365 | } | |
39b0e098 | 1366 | if (direction == Dygraph.VERTICAL) { |
8b83c6cc RK |
1367 | if (endY && startY) { |
1368 | ctx.fillStyle = "rgba(128,128,128,0.33)"; | |
1369 | ctx.fillRect(0, Math.min(startY, endY), | |
1370 | this.width_, Math.abs(endY - startY)); | |
1371 | } | |
6a1aa64f DV |
1372 | } |
1373 | }; | |
1374 | ||
1375 | /** | |
8b83c6cc RK |
1376 | * Zoom to something containing [lowX, highX]. These are pixel coordinates in |
1377 | * the canvas. The exact zoom window may be slightly larger if there are no data | |
1378 | * points near lowX or highX. Don't confuse this function with doZoomXDates, | |
1379 | * which accepts dates that match the raw data. This function redraws the graph. | |
d58ae307 | 1380 | * |
6a1aa64f DV |
1381 | * @param {Number} lowX The leftmost pixel value that should be visible. |
1382 | * @param {Number} highX The rightmost pixel value that should be visible. | |
1383 | * @private | |
1384 | */ | |
8b83c6cc | 1385 | Dygraph.prototype.doZoomX_ = function(lowX, highX) { |
6a1aa64f | 1386 | // Find the earliest and latest dates contained in this canvasx range. |
8b83c6cc | 1387 | // Convert the call to date ranges of the raw data. |
ff022deb RK |
1388 | var minDate = this.toDataXCoord(lowX); |
1389 | var maxDate = this.toDataXCoord(highX); | |
8b83c6cc RK |
1390 | this.doZoomXDates_(minDate, maxDate); |
1391 | }; | |
6a1aa64f | 1392 | |
8b83c6cc RK |
1393 | /** |
1394 | * Zoom to something containing [minDate, maxDate] values. Don't confuse this | |
1395 | * method with doZoomX which accepts pixel coordinates. This function redraws | |
1396 | * the graph. | |
d58ae307 | 1397 | * |
8b83c6cc RK |
1398 | * @param {Number} minDate The minimum date that should be visible. |
1399 | * @param {Number} maxDate The maximum date that should be visible. | |
1400 | * @private | |
1401 | */ | |
1402 | Dygraph.prototype.doZoomXDates_ = function(minDate, maxDate) { | |
6a1aa64f | 1403 | this.dateWindow_ = [minDate, maxDate]; |
26ca7938 | 1404 | this.drawGraph_(); |
285a6bda | 1405 | if (this.attr_("zoomCallback")) { |
ac139d19 | 1406 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc RK |
1407 | } |
1408 | }; | |
1409 | ||
1410 | /** | |
1411 | * Zoom to something containing [lowY, highY]. These are pixel coordinates in | |
d58ae307 DV |
1412 | * the canvas. This function redraws the graph. |
1413 | * | |
8b83c6cc RK |
1414 | * @param {Number} lowY The topmost pixel value that should be visible. |
1415 | * @param {Number} highY The lowest pixel value that should be visible. | |
1416 | * @private | |
1417 | */ | |
1418 | Dygraph.prototype.doZoomY_ = function(lowY, highY) { | |
d58ae307 DV |
1419 | // Find the highest and lowest values in pixel range for each axis. |
1420 | // Note that lowY (in pixels) corresponds to the max Value (in data coords). | |
1421 | // This is because pixels increase as you go down on the screen, whereas data | |
1422 | // coordinates increase as you go up the screen. | |
1423 | var valueRanges = []; | |
1424 | for (var i = 0; i < this.axes_.length; i++) { | |
ff022deb RK |
1425 | var hi = this.toDataYCoord(lowY, i); |
1426 | var low = this.toDataYCoord(highY, i); | |
1427 | this.axes_[i].valueWindow = [low, hi]; | |
1428 | valueRanges.push([low, hi]); | |
d58ae307 | 1429 | } |
8b83c6cc | 1430 | |
66c380c4 | 1431 | this.drawGraph_(); |
8b83c6cc | 1432 | if (this.attr_("zoomCallback")) { |
d58ae307 DV |
1433 | var xRange = this.xAxisRange(); |
1434 | this.attr_("zoomCallback")(xRange[0], xRange[1], this.yAxisRanges()); | |
8b83c6cc RK |
1435 | } |
1436 | }; | |
1437 | ||
1438 | /** | |
1439 | * Reset the zoom to the original view coordinates. This is the same as | |
1440 | * double-clicking on the graph. | |
d58ae307 | 1441 | * |
8b83c6cc RK |
1442 | * @private |
1443 | */ | |
1444 | Dygraph.prototype.doUnzoom_ = function() { | |
d58ae307 | 1445 | var dirty = false; |
8b83c6cc | 1446 | if (this.dateWindow_ != null) { |
d58ae307 | 1447 | dirty = true; |
8b83c6cc RK |
1448 | this.dateWindow_ = null; |
1449 | } | |
d58ae307 DV |
1450 | |
1451 | for (var i = 0; i < this.axes_.length; i++) { | |
1452 | if (this.axes_[i].valueWindow != null) { | |
1453 | dirty = true; | |
1454 | delete this.axes_[i].valueWindow; | |
1455 | } | |
8b83c6cc RK |
1456 | } |
1457 | ||
1458 | if (dirty) { | |
437c0979 RK |
1459 | // Putting the drawing operation before the callback because it resets |
1460 | // yAxisRange. | |
66c380c4 | 1461 | this.drawGraph_(); |
8b83c6cc RK |
1462 | if (this.attr_("zoomCallback")) { |
1463 | var minDate = this.rawData_[0][0]; | |
1464 | var maxDate = this.rawData_[this.rawData_.length - 1][0]; | |
d58ae307 | 1465 | this.attr_("zoomCallback")(minDate, maxDate, this.yAxisRanges()); |
8b83c6cc | 1466 | } |
67e650dc | 1467 | } |
6a1aa64f DV |
1468 | }; |
1469 | ||
1470 | /** | |
1471 | * When the mouse moves in the canvas, display information about a nearby data | |
1472 | * point and draw dots over those points in the data series. This function | |
1473 | * takes care of cleanup of previously-drawn dots. | |
1474 | * @param {Object} event The mousemove event from the browser. | |
1475 | * @private | |
1476 | */ | |
285a6bda | 1477 | Dygraph.prototype.mouseMove_ = function(event) { |
eb7bf005 | 1478 | var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_); |
6a1aa64f DV |
1479 | var points = this.layout_.points; |
1480 | ||
e863a17d | 1481 | // This prevents JS errors when mousing over the canvas before data loads. |
685ebbb3 | 1482 | if (points === undefined) return; |
e863a17d | 1483 | |
6a1aa64f DV |
1484 | var lastx = -1; |
1485 | var lasty = -1; | |
1486 | ||
1487 | // Loop through all the points and find the date nearest to our current | |
1488 | // location. | |
1489 | var minDist = 1e+100; | |
1490 | var idx = -1; | |
1491 | for (var i = 0; i < points.length; i++) { | |
8a7cc60e RK |
1492 | var point = points[i]; |
1493 | if (point == null) continue; | |
062ef401 | 1494 | var dist = Math.abs(point.canvasx - canvasx); |
f032c51d | 1495 | if (dist > minDist) continue; |
6a1aa64f DV |
1496 | minDist = dist; |
1497 | idx = i; | |
1498 | } | |
1499 | if (idx >= 0) lastx = points[idx].xval; | |
6a1aa64f DV |
1500 | |
1501 | // Extract the points we've selected | |
b258a3da | 1502 | this.selPoints_ = []; |
50360fd0 | 1503 | var l = points.length; |
416b05ad NK |
1504 | if (!this.attr_("stackedGraph")) { |
1505 | for (var i = 0; i < l; i++) { | |
1506 | if (points[i].xval == lastx) { | |
1507 | this.selPoints_.push(points[i]); | |
1508 | } | |
1509 | } | |
1510 | } else { | |
354e15ab DE |
1511 | // Need to 'unstack' points starting from the bottom |
1512 | var cumulative_sum = 0; | |
416b05ad NK |
1513 | for (var i = l - 1; i >= 0; i--) { |
1514 | if (points[i].xval == lastx) { | |
354e15ab | 1515 | var p = {}; // Clone the point since we modify it |
d4139cd8 NK |
1516 | for (var k in points[i]) { |
1517 | p[k] = points[i][k]; | |
50360fd0 NK |
1518 | } |
1519 | p.yval -= cumulative_sum; | |
1520 | cumulative_sum += p.yval; | |
d4139cd8 | 1521 | this.selPoints_.push(p); |
12e4c741 | 1522 | } |
6a1aa64f | 1523 | } |
354e15ab | 1524 | this.selPoints_.reverse(); |
6a1aa64f DV |
1525 | } |
1526 | ||
b258a3da | 1527 | if (this.attr_("highlightCallback")) { |
a4c6a67c | 1528 | var px = this.lastx_; |
dd082dda | 1529 | if (px !== null && lastx != px) { |
344ba8c0 | 1530 | // only fire if the selected point has changed. |
2ddb1197 | 1531 | this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx)); |
43af96e7 | 1532 | } |
12e4c741 | 1533 | } |
43af96e7 | 1534 | |
239c712d NAG |
1535 | // Save last x position for callbacks. |
1536 | this.lastx_ = lastx; | |
50360fd0 | 1537 | |
239c712d NAG |
1538 | this.updateSelection_(); |
1539 | }; | |
b258a3da | 1540 | |
239c712d | 1541 | /** |
1903f1e4 | 1542 | * Transforms layout_.points index into data row number. |
2ddb1197 | 1543 | * @param int layout_.points index |
1903f1e4 | 1544 | * @return int row number, or -1 if none could be found. |
2ddb1197 SC |
1545 | * @private |
1546 | */ | |
1547 | Dygraph.prototype.idxToRow_ = function(idx) { | |
1903f1e4 | 1548 | if (idx < 0) return -1; |
2ddb1197 | 1549 | |
1903f1e4 DV |
1550 | for (var i in this.layout_.datasets) { |
1551 | if (idx < this.layout_.datasets[i].length) { | |
1552 | return this.boundaryIds_[0][0]+idx; | |
1553 | } | |
1554 | idx -= this.layout_.datasets[i].length; | |
1555 | } | |
1556 | return -1; | |
1557 | }; | |
2ddb1197 | 1558 | |
2fccd3dc | 1559 | // TODO(danvk): rename this function to something like 'isNonZeroNan'. |
e9fe4a2f DV |
1560 | Dygraph.isOK = function(x) { |
1561 | return x && !isNaN(x); | |
1562 | }; | |
1563 | ||
1564 | Dygraph.prototype.generateLegendHTML_ = function(x, sel_points) { | |
2fccd3dc DV |
1565 | // If no points are selected, we display a default legend. Traditionally, |
1566 | // this has been blank. But a better default would be a conventional legend, | |
1567 | // which provides essential information for a non-interactive chart. | |
1568 | if (typeof(x) === 'undefined') { | |
1569 | if (this.attr_('legend') != 'always') return ''; | |
1570 | ||
1571 | var sepLines = this.attr_('labelsSeparateLines'); | |
1572 | var labels = this.attr_('labels'); | |
1573 | var html = ''; | |
1574 | for (var i = 1; i < labels.length; i++) { | |
1575 | var c = new RGBColor(this.plotter_.colors[labels[i]]); | |
1576 | if (i > 1) html += (sepLines ? '<br/>' : ' '); | |
1577 | html += "<b><font color='" + c.toHex() + "'>—" + labels[i] + | |
1578 | "</font></b>"; | |
1579 | } | |
1580 | return html; | |
1581 | } | |
1582 | ||
e9fe4a2f DV |
1583 | var displayDigits = this.numXDigits_ + this.numExtraDigits_; |
1584 | var html = this.attr_('xValueFormatter')(x, displayDigits) + ":"; | |
1585 | ||
1586 | var fmtFunc = this.attr_('yValueFormatter'); | |
1587 | var showZeros = this.attr_("labelsShowZeroValues"); | |
1588 | var sepLines = this.attr_("labelsSeparateLines"); | |
1589 | for (var i = 0; i < this.selPoints_.length; i++) { | |
1590 | var pt = this.selPoints_[i]; | |
1591 | if (pt.yval == 0 && !showZeros) continue; | |
1592 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
1593 | if (sepLines) html += "<br/>"; | |
1594 | ||
1595 | var c = new RGBColor(this.plotter_.colors[pt.name]); | |
1596 | var yval = fmtFunc(pt.yval, displayDigits); | |
2fccd3dc | 1597 | // TODO(danvk): use a template string here and make it an attribute. |
e9fe4a2f DV |
1598 | html += " <b><font color='" + c.toHex() + "'>" |
1599 | + pt.name + "</font></b>:" | |
1600 | + yval; | |
1601 | } | |
1602 | return html; | |
1603 | }; | |
1604 | ||
2ddb1197 | 1605 | /** |
239c712d NAG |
1606 | * Draw dots over the selectied points in the data series. This function |
1607 | * takes care of cleanup of previously-drawn dots. | |
1608 | * @private | |
1609 | */ | |
1610 | Dygraph.prototype.updateSelection_ = function() { | |
6a1aa64f | 1611 | // Clear the previously drawn vertical, if there is one |
6a1aa64f DV |
1612 | var ctx = this.canvas_.getContext("2d"); |
1613 | if (this.previousVerticalX_ >= 0) { | |
46dde5f9 DV |
1614 | // Determine the maximum highlight circle size. |
1615 | var maxCircleSize = 0; | |
227b93cc DV |
1616 | var labels = this.attr_('labels'); |
1617 | for (var i = 1; i < labels.length; i++) { | |
1618 | var r = this.attr_('highlightCircleSize', labels[i]); | |
46dde5f9 DV |
1619 | if (r > maxCircleSize) maxCircleSize = r; |
1620 | } | |
6a1aa64f | 1621 | var px = this.previousVerticalX_; |
46dde5f9 DV |
1622 | ctx.clearRect(px - maxCircleSize - 1, 0, |
1623 | 2 * maxCircleSize + 2, this.height_); | |
6a1aa64f DV |
1624 | } |
1625 | ||
d160cc3b | 1626 | if (this.selPoints_.length > 0) { |
6a1aa64f | 1627 | // Set the status message to indicate the selected point(s) |
d160cc3b | 1628 | if (this.attr_('showLabelsOnHighlight')) { |
e9fe4a2f DV |
1629 | var html = this.generateLegendHTML_(this.lastx_, this.selPoints_); |
1630 | this.attr_("labelsDiv").innerHTML = html; | |
6a1aa64f | 1631 | } |
6a1aa64f | 1632 | |
6a1aa64f | 1633 | // Draw colored circles over the center of each selected point |
e9fe4a2f | 1634 | var canvasx = this.selPoints_[0].canvasx; |
43af96e7 | 1635 | ctx.save(); |
b258a3da | 1636 | for (var i = 0; i < this.selPoints_.length; i++) { |
e9fe4a2f DV |
1637 | var pt = this.selPoints_[i]; |
1638 | if (!Dygraph.isOK(pt.canvasy)) continue; | |
1639 | ||
1640 | var circleSize = this.attr_('highlightCircleSize', pt.name); | |
6a1aa64f | 1641 | ctx.beginPath(); |
e9fe4a2f DV |
1642 | ctx.fillStyle = this.plotter_.colors[pt.name]; |
1643 | ctx.arc(canvasx, pt.canvasy, circleSize, 0, 2 * Math.PI, false); | |
6a1aa64f DV |
1644 | ctx.fill(); |
1645 | } | |
1646 | ctx.restore(); | |
1647 | ||
1648 | this.previousVerticalX_ = canvasx; | |
1649 | } | |
1650 | }; | |
1651 | ||
1652 | /** | |
239c712d NAG |
1653 | * Set manually set selected dots, and display information about them |
1654 | * @param int row number that should by highlighted | |
1655 | * false value clears the selection | |
1656 | * @public | |
1657 | */ | |
1658 | Dygraph.prototype.setSelection = function(row) { | |
1659 | // Extract the points we've selected | |
1660 | this.selPoints_ = []; | |
1661 | var pos = 0; | |
50360fd0 | 1662 | |
239c712d | 1663 | if (row !== false) { |
16269f6e NAG |
1664 | row = row-this.boundaryIds_[0][0]; |
1665 | } | |
50360fd0 | 1666 | |
16269f6e | 1667 | if (row !== false && row >= 0) { |
239c712d | 1668 | for (var i in this.layout_.datasets) { |
16269f6e | 1669 | if (row < this.layout_.datasets[i].length) { |
38f33a44 | 1670 | var point = this.layout_.points[pos+row]; |
1671 | ||
1672 | if (this.attr_("stackedGraph")) { | |
8c03ba63 | 1673 | point = this.layout_.unstackPointAtIndex(pos+row); |
38f33a44 | 1674 | } |
1675 | ||
1676 | this.selPoints_.push(point); | |
16269f6e | 1677 | } |
239c712d NAG |
1678 | pos += this.layout_.datasets[i].length; |
1679 | } | |
16269f6e | 1680 | } |
50360fd0 | 1681 | |
16269f6e | 1682 | if (this.selPoints_.length) { |
239c712d NAG |
1683 | this.lastx_ = this.selPoints_[0].xval; |
1684 | this.updateSelection_(); | |
1685 | } else { | |
1686 | this.lastx_ = -1; | |
1687 | this.clearSelection(); | |
1688 | } | |
1689 | ||
1690 | }; | |
1691 | ||
1692 | /** | |
6a1aa64f DV |
1693 | * The mouse has left the canvas. Clear out whatever artifacts remain |
1694 | * @param {Object} event the mouseout event from the browser. | |
1695 | * @private | |
1696 | */ | |
285a6bda | 1697 | Dygraph.prototype.mouseOut_ = function(event) { |
a4c6a67c AV |
1698 | if (this.attr_("unhighlightCallback")) { |
1699 | this.attr_("unhighlightCallback")(event); | |
1700 | } | |
1701 | ||
43af96e7 | 1702 | if (this.attr_("hideOverlayOnMouseOut")) { |
239c712d | 1703 | this.clearSelection(); |
43af96e7 | 1704 | } |
6a1aa64f DV |
1705 | }; |
1706 | ||
239c712d NAG |
1707 | /** |
1708 | * Remove all selection from the canvas | |
1709 | * @public | |
1710 | */ | |
1711 | Dygraph.prototype.clearSelection = function() { | |
1712 | // Get rid of the overlay data | |
1713 | var ctx = this.canvas_.getContext("2d"); | |
1714 | ctx.clearRect(0, 0, this.width_, this.height_); | |
2fccd3dc | 1715 | this.attr_('labelsDiv').innerHTML = this.generateLegendHTML_(); |
239c712d NAG |
1716 | this.selPoints_ = []; |
1717 | this.lastx_ = -1; | |
1718 | } | |
1719 | ||
103b7292 NAG |
1720 | /** |
1721 | * Returns the number of the currently selected row | |
1722 | * @return int row number, of -1 if nothing is selected | |
1723 | * @public | |
1724 | */ | |
1725 | Dygraph.prototype.getSelection = function() { | |
1726 | if (!this.selPoints_ || this.selPoints_.length < 1) { | |
1727 | return -1; | |
1728 | } | |
50360fd0 | 1729 | |
103b7292 NAG |
1730 | for (var row=0; row<this.layout_.points.length; row++ ) { |
1731 | if (this.layout_.points[row].x == this.selPoints_[0].x) { | |
16269f6e | 1732 | return row + this.boundaryIds_[0][0]; |
103b7292 NAG |
1733 | } |
1734 | } | |
1735 | return -1; | |
1736 | } | |
1737 | ||
285a6bda | 1738 | Dygraph.zeropad = function(x) { |
32988383 DV |
1739 | if (x < 10) return "0" + x; else return "" + x; |
1740 | } | |
1741 | ||
6a1aa64f | 1742 | /** |
6b8e33dd DV |
1743 | * Return a string version of the hours, minutes and seconds portion of a date. |
1744 | * @param {Number} date The JavaScript date (ms since epoch) | |
1745 | * @return {String} A time of the form "HH:MM:SS" | |
1746 | * @private | |
1747 | */ | |
bf640e56 | 1748 | Dygraph.hmsString_ = function(date) { |
285a6bda | 1749 | var zeropad = Dygraph.zeropad; |
6b8e33dd DV |
1750 | var d = new Date(date); |
1751 | if (d.getSeconds()) { | |
1752 | return zeropad(d.getHours()) + ":" + | |
1753 | zeropad(d.getMinutes()) + ":" + | |
1754 | zeropad(d.getSeconds()); | |
6b8e33dd | 1755 | } else { |
054531ca | 1756 | return zeropad(d.getHours()) + ":" + zeropad(d.getMinutes()); |
6b8e33dd DV |
1757 | } |
1758 | } | |
1759 | ||
1760 | /** | |
bf640e56 AV |
1761 | * Convert a JS date to a string appropriate to display on an axis that |
1762 | * is displaying values at the stated granularity. | |
1763 | * @param {Date} date The date to format | |
1764 | * @param {Number} granularity One of the Dygraph granularity constants | |
1765 | * @return {String} The formatted date | |
1766 | * @private | |
1767 | */ | |
1768 | Dygraph.dateAxisFormatter = function(date, granularity) { | |
062ef401 JB |
1769 | if (granularity >= Dygraph.DECADAL) { |
1770 | return date.strftime('%Y'); | |
1771 | } else if (granularity >= Dygraph.MONTHLY) { | |
bf640e56 AV |
1772 | return date.strftime('%b %y'); |
1773 | } else { | |
31eddad3 | 1774 | var frac = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds() + date.getMilliseconds(); |
bf640e56 AV |
1775 | if (frac == 0 || granularity >= Dygraph.DAILY) { |
1776 | return new Date(date.getTime() + 3600*1000).strftime('%d%b'); | |
1777 | } else { | |
1778 | return Dygraph.hmsString_(date.getTime()); | |
1779 | } | |
1780 | } | |
1781 | } | |
1782 | ||
1783 | /** | |
6a1aa64f DV |
1784 | * Convert a JS date (millis since epoch) to YYYY/MM/DD |
1785 | * @param {Number} date The JavaScript date (ms since epoch) | |
1786 | * @return {String} A date of the form "YYYY/MM/DD" | |
1787 | * @private | |
1788 | */ | |
6be8e54c | 1789 | Dygraph.dateString_ = function(date) { |
285a6bda | 1790 | var zeropad = Dygraph.zeropad; |
6a1aa64f DV |
1791 | var d = new Date(date); |
1792 | ||
1793 | // Get the year: | |
1794 | var year = "" + d.getFullYear(); | |
1795 | // Get a 0 padded month string | |
6b8e33dd | 1796 | var month = zeropad(d.getMonth() + 1); //months are 0-offset, sigh |
6a1aa64f | 1797 | // Get a 0 padded day string |
6b8e33dd | 1798 | var day = zeropad(d.getDate()); |
6a1aa64f | 1799 | |
6b8e33dd DV |
1800 | var ret = ""; |
1801 | var frac = d.getHours() * 3600 + d.getMinutes() * 60 + d.getSeconds(); | |
bf640e56 | 1802 | if (frac) ret = " " + Dygraph.hmsString_(date); |
6b8e33dd DV |
1803 | |
1804 | return year + "/" + month + "/" + day + ret; | |
6a1aa64f DV |
1805 | }; |
1806 | ||
1807 | /** | |
6a1aa64f DV |
1808 | * Fires when there's data available to be graphed. |
1809 | * @param {String} data Raw CSV data to be plotted | |
1810 | * @private | |
1811 | */ | |
285a6bda | 1812 | Dygraph.prototype.loadedEvent_ = function(data) { |
6a1aa64f | 1813 | this.rawData_ = this.parseCSV_(data); |
26ca7938 | 1814 | this.predraw_(); |
6a1aa64f DV |
1815 | }; |
1816 | ||
285a6bda | 1817 | Dygraph.prototype.months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", |
8846615a | 1818 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]; |
285a6bda | 1819 | Dygraph.prototype.quarters = ["Jan", "Apr", "Jul", "Oct"]; |
6a1aa64f DV |
1820 | |
1821 | /** | |
1822 | * Add ticks on the x-axis representing years, months, quarters, weeks, or days | |
1823 | * @private | |
1824 | */ | |
285a6bda | 1825 | Dygraph.prototype.addXTicks_ = function() { |
6a1aa64f | 1826 | // Determine the correct ticks scale on the x-axis: quarterly, monthly, ... |
7201b11e | 1827 | var range; |
6a1aa64f | 1828 | if (this.dateWindow_) { |
7201b11e | 1829 | range = [this.dateWindow_[0], this.dateWindow_[1]]; |
6a1aa64f | 1830 | } else { |
7201b11e JB |
1831 | range = [this.rawData_[0][0], this.rawData_[this.rawData_.length - 1][0]]; |
1832 | } | |
1833 | ||
1834 | var formatter = this.attr_('xTicker'); | |
1835 | var ret = formatter(range[0], range[1], this); | |
1836 | var xTicks = []; | |
1837 | ||
7aedf6fe DV |
1838 | // Note: numericTicks() returns a {ticks: [...], numDigits: yy} dictionary, |
1839 | // whereas dateTicker and user-defined tickers typically just return a ticks | |
1840 | // array. | |
7201b11e | 1841 | if (ret.ticks !== undefined) { |
7201b11e | 1842 | xTicks = ret.ticks; |
6be8e54c | 1843 | this.numXDigits_ = ret.numDigits; |
7201b11e JB |
1844 | } else { |
1845 | xTicks = ret; | |
3c1d225b | 1846 | } |
7201b11e JB |
1847 | |
1848 | this.layout_.updateOptions({xTicks: xTicks}); | |
32988383 DV |
1849 | }; |
1850 | ||
1851 | // Time granularity enumeration | |
285a6bda | 1852 | Dygraph.SECONDLY = 0; |
20a41c17 DV |
1853 | Dygraph.TWO_SECONDLY = 1; |
1854 | Dygraph.FIVE_SECONDLY = 2; | |
1855 | Dygraph.TEN_SECONDLY = 3; | |
1856 | Dygraph.THIRTY_SECONDLY = 4; | |
1857 | Dygraph.MINUTELY = 5; | |
1858 | Dygraph.TWO_MINUTELY = 6; | |
1859 | Dygraph.FIVE_MINUTELY = 7; | |
1860 | Dygraph.TEN_MINUTELY = 8; | |
1861 | Dygraph.THIRTY_MINUTELY = 9; | |
1862 | Dygraph.HOURLY = 10; | |
1863 | Dygraph.TWO_HOURLY = 11; | |
1864 | Dygraph.SIX_HOURLY = 12; | |
1865 | Dygraph.DAILY = 13; | |
1866 | Dygraph.WEEKLY = 14; | |
1867 | Dygraph.MONTHLY = 15; | |
1868 | Dygraph.QUARTERLY = 16; | |
1869 | Dygraph.BIANNUAL = 17; | |
1870 | Dygraph.ANNUAL = 18; | |
1871 | Dygraph.DECADAL = 19; | |
062ef401 JB |
1872 | Dygraph.CENTENNIAL = 20; |
1873 | Dygraph.NUM_GRANULARITIES = 21; | |
285a6bda DV |
1874 | |
1875 | Dygraph.SHORT_SPACINGS = []; | |
1876 | Dygraph.SHORT_SPACINGS[Dygraph.SECONDLY] = 1000 * 1; | |
20a41c17 DV |
1877 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_SECONDLY] = 1000 * 2; |
1878 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_SECONDLY] = 1000 * 5; | |
285a6bda DV |
1879 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_SECONDLY] = 1000 * 10; |
1880 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_SECONDLY] = 1000 * 30; | |
1881 | Dygraph.SHORT_SPACINGS[Dygraph.MINUTELY] = 1000 * 60; | |
20a41c17 DV |
1882 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_MINUTELY] = 1000 * 60 * 2; |
1883 | Dygraph.SHORT_SPACINGS[Dygraph.FIVE_MINUTELY] = 1000 * 60 * 5; | |
285a6bda DV |
1884 | Dygraph.SHORT_SPACINGS[Dygraph.TEN_MINUTELY] = 1000 * 60 * 10; |
1885 | Dygraph.SHORT_SPACINGS[Dygraph.THIRTY_MINUTELY] = 1000 * 60 * 30; | |
1886 | Dygraph.SHORT_SPACINGS[Dygraph.HOURLY] = 1000 * 3600; | |
20a41c17 | 1887 | Dygraph.SHORT_SPACINGS[Dygraph.TWO_HOURLY] = 1000 * 3600 * 2; |
805d5519 | 1888 | Dygraph.SHORT_SPACINGS[Dygraph.SIX_HOURLY] = 1000 * 3600 * 6; |
285a6bda DV |
1889 | Dygraph.SHORT_SPACINGS[Dygraph.DAILY] = 1000 * 86400; |
1890 | Dygraph.SHORT_SPACINGS[Dygraph.WEEKLY] = 1000 * 604800; | |
32988383 DV |
1891 | |
1892 | // NumXTicks() | |
1893 | // | |
1894 | // If we used this time granularity, how many ticks would there be? | |
1895 | // This is only an approximation, but it's generally good enough. | |
1896 | // | |
285a6bda DV |
1897 | Dygraph.prototype.NumXTicks = function(start_time, end_time, granularity) { |
1898 | if (granularity < Dygraph.MONTHLY) { | |
32988383 | 1899 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1900 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
32988383 DV |
1901 | return Math.floor(0.5 + 1.0 * (end_time - start_time) / spacing); |
1902 | } else { | |
1903 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1904 | var num_months = 12; | |
285a6bda DV |
1905 | if (granularity == Dygraph.QUARTERLY) num_months = 3; |
1906 | if (granularity == Dygraph.BIANNUAL) num_months = 2; | |
1907 | if (granularity == Dygraph.ANNUAL) num_months = 1; | |
1908 | if (granularity == Dygraph.DECADAL) { num_months = 1; year_mod = 10; } | |
062ef401 | 1909 | if (granularity == Dygraph.CENTENNIAL) { num_months = 1; year_mod = 100; } |
32988383 DV |
1910 | |
1911 | var msInYear = 365.2524 * 24 * 3600 * 1000; | |
1912 | var num_years = 1.0 * (end_time - start_time) / msInYear; | |
1913 | return Math.floor(0.5 + 1.0 * num_years * num_months / year_mod); | |
1914 | } | |
1915 | }; | |
1916 | ||
1917 | // GetXAxis() | |
1918 | // | |
1919 | // Construct an x-axis of nicely-formatted times on meaningful boundaries | |
1920 | // (e.g. 'Jan 09' rather than 'Jan 22, 2009'). | |
1921 | // | |
1922 | // Returns an array containing {v: millis, label: label} dictionaries. | |
1923 | // | |
285a6bda | 1924 | Dygraph.prototype.GetXAxis = function(start_time, end_time, granularity) { |
bf640e56 | 1925 | var formatter = this.attr_("xAxisLabelFormatter"); |
32988383 | 1926 | var ticks = []; |
285a6bda | 1927 | if (granularity < Dygraph.MONTHLY) { |
32988383 | 1928 | // Generate one tick mark for every fixed interval of time. |
285a6bda | 1929 | var spacing = Dygraph.SHORT_SPACINGS[granularity]; |
3d29302c | 1930 | var format = '%d%b'; // e.g. "1Jan" |
076c9622 DV |
1931 | |
1932 | // Find a time less than start_time which occurs on a "nice" time boundary | |
1933 | // for this granularity. | |
1934 | var g = spacing / 1000; | |
076c9622 DV |
1935 | var d = new Date(start_time); |
1936 | if (g <= 60) { // seconds | |
1937 | var x = d.getSeconds(); d.setSeconds(x - x % g); | |
1938 | } else { | |
1939 | d.setSeconds(0); | |
1940 | g /= 60; | |
1941 | if (g <= 60) { // minutes | |
1942 | var x = d.getMinutes(); d.setMinutes(x - x % g); | |
1943 | } else { | |
1944 | d.setMinutes(0); | |
1945 | g /= 60; | |
1946 | ||
1947 | if (g <= 24) { // days | |
1948 | var x = d.getHours(); d.setHours(x - x % g); | |
1949 | } else { | |
1950 | d.setHours(0); | |
1951 | g /= 24; | |
1952 | ||
1953 | if (g == 7) { // one week | |
20a41c17 | 1954 | d.setDate(d.getDate() - d.getDay()); |
076c9622 DV |
1955 | } |
1956 | } | |
1957 | } | |
328bb812 | 1958 | } |
076c9622 DV |
1959 | start_time = d.getTime(); |
1960 | ||
32988383 | 1961 | for (var t = start_time; t <= end_time; t += spacing) { |
bf640e56 | 1962 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1963 | } |
1964 | } else { | |
1965 | // Display a tick mark on the first of a set of months of each year. | |
1966 | // Years get a tick mark iff y % year_mod == 0. This is useful for | |
1967 | // displaying a tick mark once every 10 years, say, on long time scales. | |
1968 | var months; | |
1969 | var year_mod = 1; // e.g. to only print one point every 10 years. | |
1970 | ||
285a6bda | 1971 | if (granularity == Dygraph.MONTHLY) { |
32988383 | 1972 | months = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 ]; |
285a6bda | 1973 | } else if (granularity == Dygraph.QUARTERLY) { |
32988383 | 1974 | months = [ 0, 3, 6, 9 ]; |
285a6bda | 1975 | } else if (granularity == Dygraph.BIANNUAL) { |
32988383 | 1976 | months = [ 0, 6 ]; |
285a6bda | 1977 | } else if (granularity == Dygraph.ANNUAL) { |
32988383 | 1978 | months = [ 0 ]; |
285a6bda | 1979 | } else if (granularity == Dygraph.DECADAL) { |
32988383 DV |
1980 | months = [ 0 ]; |
1981 | year_mod = 10; | |
062ef401 JB |
1982 | } else if (granularity == Dygraph.CENTENNIAL) { |
1983 | months = [ 0 ]; | |
1984 | year_mod = 100; | |
1985 | } else { | |
1986 | this.warn("Span of dates is too long"); | |
32988383 DV |
1987 | } |
1988 | ||
1989 | var start_year = new Date(start_time).getFullYear(); | |
1990 | var end_year = new Date(end_time).getFullYear(); | |
285a6bda | 1991 | var zeropad = Dygraph.zeropad; |
32988383 DV |
1992 | for (var i = start_year; i <= end_year; i++) { |
1993 | if (i % year_mod != 0) continue; | |
1994 | for (var j = 0; j < months.length; j++) { | |
1995 | var date_str = i + "/" + zeropad(1 + months[j]) + "/01"; | |
1996 | var t = Date.parse(date_str); | |
1997 | if (t < start_time || t > end_time) continue; | |
bf640e56 | 1998 | ticks.push({ v:t, label: formatter(new Date(t), granularity) }); |
32988383 DV |
1999 | } |
2000 | } | |
2001 | } | |
2002 | ||
2003 | return ticks; | |
2004 | }; | |
2005 | ||
6a1aa64f DV |
2006 | |
2007 | /** | |
2008 | * Add ticks to the x-axis based on a date range. | |
2009 | * @param {Number} startDate Start of the date window (millis since epoch) | |
2010 | * @param {Number} endDate End of the date window (millis since epoch) | |
2011 | * @return {Array.<Object>} Array of {label, value} tuples. | |
2012 | * @public | |
2013 | */ | |
285a6bda | 2014 | Dygraph.dateTicker = function(startDate, endDate, self) { |
32988383 | 2015 | var chosen = -1; |
285a6bda DV |
2016 | for (var i = 0; i < Dygraph.NUM_GRANULARITIES; i++) { |
2017 | var num_ticks = self.NumXTicks(startDate, endDate, i); | |
2018 | if (self.width_ / num_ticks >= self.attr_('pixelsPerXLabel')) { | |
32988383 DV |
2019 | chosen = i; |
2020 | break; | |
2769de62 | 2021 | } |
6a1aa64f DV |
2022 | } |
2023 | ||
32988383 | 2024 | if (chosen >= 0) { |
285a6bda | 2025 | return self.GetXAxis(startDate, endDate, chosen); |
6a1aa64f | 2026 | } else { |
32988383 | 2027 | // TODO(danvk): signal error. |
6a1aa64f | 2028 | } |
6a1aa64f DV |
2029 | }; |
2030 | ||
c1bc242a DV |
2031 | // This is a list of human-friendly values at which to show tick marks on a log |
2032 | // scale. It is k * 10^n, where k=1..9 and n=-39..+39, so: | |
2033 | // ..., 1, 2, 3, 4, 5, ..., 9, 10, 20, 30, ..., 90, 100, 200, 300, ... | |
5db0e241 | 2034 | // NOTE: this assumes that Dygraph.LOG_SCALE = 10. |
0cfa06d1 | 2035 | Dygraph.PREFERRED_LOG_TICK_VALUES = function() { |
6821efbe RK |
2036 | var vals = []; |
2037 | for (var power = -39; power <= 39; power++) { | |
2038 | var range = Math.pow(10, power); | |
4b467120 RK |
2039 | for (var mult = 1; mult <= 9; mult++) { |
2040 | var val = range * mult; | |
6821efbe RK |
2041 | vals.push(val); |
2042 | } | |
2043 | } | |
2044 | return vals; | |
2045 | }(); | |
2046 | ||
0cfa06d1 RK |
2047 | // val is the value to search for |
2048 | // arry is the value over which to search | |
2049 | // if abs > 0, find the lowest entry greater than val | |
2050 | // if abs < 0, find the highest entry less than val | |
2051 | // if abs == 0, find the entry that equals val. | |
2052 | // Currently does not work when val is outside the range of arry's values. | |
2053 | Dygraph.binarySearch = function(val, arry, abs, low, high) { | |
2054 | if (low == null || high == null) { | |
2055 | low = 0; | |
2056 | high = arry.length - 1; | |
2057 | } | |
2058 | if (low > high) { | |
2059 | return -1; | |
2060 | } | |
2061 | if (abs == null) { | |
2062 | abs = 0; | |
2063 | } | |
2064 | var validIndex = function(idx) { | |
2065 | return idx >= 0 && idx < arry.length; | |
2066 | } | |
2067 | var mid = parseInt((low + high) / 2); | |
2068 | var element = arry[mid]; | |
2069 | if (element == val) { | |
2070 | return mid; | |
2071 | } | |
2072 | if (element > val) { | |
2073 | if (abs > 0) { | |
2074 | // Accept if element > val, but also if prior element < val. | |
2075 | var idx = mid - 1; | |
2076 | if (validIndex(idx) && arry[idx] < val) { | |
2077 | return mid; | |
2078 | } | |
2079 | } | |
c1bc242a | 2080 | return Dygraph.binarySearch(val, arry, abs, low, mid - 1); |
0cfa06d1 RK |
2081 | } |
2082 | if (element < val) { | |
2083 | if (abs < 0) { | |
2084 | // Accept if element < val, but also if prior element > val. | |
2085 | var idx = mid + 1; | |
2086 | if (validIndex(idx) && arry[idx] > val) { | |
2087 | return mid; | |
2088 | } | |
2089 | } | |
2090 | return Dygraph.binarySearch(val, arry, abs, mid + 1, high); | |
2091 | } | |
60a19014 | 2092 | }; |
0cfa06d1 | 2093 | |
6a1aa64f | 2094 | /** |
3c1d225b JB |
2095 | * Determine the number of significant figures in a Number up to the specified |
2096 | * precision. Note that there is no way to determine if a trailing '0' is | |
2097 | * significant or not, so by convention we return 1 for all of the following | |
2098 | * inputs: 1, 1.0, 1.00, 1.000 etc. | |
2099 | * @param {Number} x The input value. | |
2100 | * @param {Number} opt_maxPrecision Optional maximum precision to consider. | |
2101 | * Default and maximum allowed value is 13. | |
2102 | * @return {Number} The number of significant figures which is >= 1. | |
2103 | */ | |
2104 | Dygraph.significantFigures = function(x, opt_maxPrecision) { | |
2105 | var precision = Math.max(opt_maxPrecision || 13, 13); | |
2106 | ||
fff1de86 | 2107 | // Convert the number to its exponential notation form and work backwards, |
3c1d225b JB |
2108 | // ignoring the 'e+xx' bit. This may seem like a hack, but doing a loop and |
2109 | // dividing by 10 leads to roundoff errors. By using toExponential(), we let | |
2110 | // the JavaScript interpreter handle the low level bits of the Number for us. | |
2111 | var s = x.toExponential(precision); | |
2112 | var ePos = s.lastIndexOf('e'); // -1 case handled by return below. | |
2113 | ||
2114 | for (var i = ePos - 1; i >= 0; i--) { | |
2115 | if (s[i] == '.') { | |
2116 | // Got to the decimal place. We'll call this 1 digit of precision because | |
2117 | // we can't know for sure how many trailing 0s are significant. | |
2118 | return 1; | |
2119 | } else if (s[i] != '0') { | |
2120 | // Found the first non-zero digit. Return the number of characters | |
2121 | // except for the '.'. | |
2122 | return i; // This is i - 1 + 1 (-1 is for '.', +1 is for 0 based index). | |
2123 | } | |
2124 | } | |
2125 | ||
2126 | // Occurs if toExponential() doesn't return a string containing 'e', which | |
2127 | // should never happen. | |
2128 | return 1; | |
2129 | }; | |
2130 | ||
2131 | /** | |
6a1aa64f | 2132 | * Add ticks when the x axis has numbers on it (instead of dates) |
ff022deb RK |
2133 | * TODO(konigsberg): Update comment. |
2134 | * | |
7d0e7a0d RK |
2135 | * @param {Number} minV minimum value |
2136 | * @param {Number} maxV maximum value | |
84fc6aa7 | 2137 | * @param self |
f30cf740 | 2138 | * @param {function} attribute accessor function. |
6a1aa64f DV |
2139 | * @return {Array.<Object>} Array of {label, value} tuples. |
2140 | * @public | |
2141 | */ | |
0d64e596 | 2142 | Dygraph.numericTicks = function(minV, maxV, self, axis_props, vals) { |
70c80071 DV |
2143 | var attr = function(k) { |
2144 | if (axis_props && axis_props.hasOwnProperty(k)) return axis_props[k]; | |
2145 | return self.attr_(k); | |
2146 | }; | |
f09fc545 | 2147 | |
0d64e596 DV |
2148 | var ticks = []; |
2149 | if (vals) { | |
2150 | for (var i = 0; i < vals.length; i++) { | |
e863a17d | 2151 | ticks.push({v: vals[i]}); |
0d64e596 | 2152 | } |
f09e46d4 | 2153 | } else { |
7d0e7a0d | 2154 | if (axis_props && attr("logscale")) { |
ff022deb | 2155 | var pixelsPerTick = attr('pixelsPerYLabel'); |
7d0e7a0d | 2156 | // NOTE(konigsberg): Dan, should self.height_ be self.plotter_.area.h? |
ff022deb | 2157 | var nTicks = Math.floor(self.height_ / pixelsPerTick); |
0cfa06d1 RK |
2158 | var minIdx = Dygraph.binarySearch(minV, Dygraph.PREFERRED_LOG_TICK_VALUES, 1); |
2159 | var maxIdx = Dygraph.binarySearch(maxV, Dygraph.PREFERRED_LOG_TICK_VALUES, -1); | |
2160 | if (minIdx == -1) { | |
6821efbe RK |
2161 | minIdx = 0; |
2162 | } | |
0cfa06d1 RK |
2163 | if (maxIdx == -1) { |
2164 | maxIdx = Dygraph.PREFERRED_LOG_TICK_VALUES.length - 1; | |
6821efbe | 2165 | } |
0cfa06d1 RK |
2166 | // Count the number of tick values would appear, if we can get at least |
2167 | // nTicks / 4 accept them. | |
00aa7f61 | 2168 | var lastDisplayed = null; |
0cfa06d1 | 2169 | if (maxIdx - minIdx >= nTicks / 4) { |
00aa7f61 | 2170 | var axisId = axis_props.yAxisId; |
0cfa06d1 RK |
2171 | for (var idx = maxIdx; idx >= minIdx; idx--) { |
2172 | var tickValue = Dygraph.PREFERRED_LOG_TICK_VALUES[idx]; | |
00aa7f61 RK |
2173 | var domCoord = axis_props.g.toDomYCoord(tickValue, axisId); |
2174 | var tick = { v: tickValue }; | |
2175 | if (lastDisplayed == null) { | |
2176 | lastDisplayed = { | |
2177 | tickValue : tickValue, | |
2178 | domCoord : domCoord | |
2179 | }; | |
2180 | } else { | |
2181 | if (domCoord - lastDisplayed.domCoord >= pixelsPerTick) { | |
2182 | lastDisplayed = { | |
2183 | tickValue : tickValue, | |
2184 | domCoord : domCoord | |
2185 | }; | |
2186 | } else { | |
c1bc242a | 2187 | tick.label = ""; |
00aa7f61 RK |
2188 | } |
2189 | } | |
2190 | ticks.push(tick); | |
6821efbe | 2191 | } |
0cfa06d1 RK |
2192 | // Since we went in backwards order. |
2193 | ticks.reverse(); | |
6821efbe | 2194 | } |
f09e46d4 | 2195 | } |
c1bc242a | 2196 | |
6821efbe RK |
2197 | // ticks.length won't be 0 if the log scale function finds values to insert. |
2198 | if (ticks.length == 0) { | |
ff022deb RK |
2199 | // Basic idea: |
2200 | // Try labels every 1, 2, 5, 10, 20, 50, 100, etc. | |
2201 | // Calculate the resulting tick spacing (i.e. this.height_ / nTicks). | |
2202 | // The first spacing greater than pixelsPerYLabel is what we use. | |
2203 | // TODO(danvk): version that works on a log scale. | |
0d64e596 | 2204 | if (attr("labelsKMG2")) { |
ff022deb | 2205 | var mults = [1, 2, 4, 8]; |
0d64e596 | 2206 | } else { |
ff022deb | 2207 | var mults = [1, 2, 5]; |
0d64e596 | 2208 | } |
ff022deb RK |
2209 | var scale, low_val, high_val, nTicks; |
2210 | // TODO(danvk): make it possible to set this for x- and y-axes independently. | |
2211 | var pixelsPerTick = attr('pixelsPerYLabel'); | |
2212 | for (var i = -10; i < 50; i++) { | |
2213 | if (attr("labelsKMG2")) { | |
2214 | var base_scale = Math.pow(16, i); | |
2215 | } else { | |
2216 | var base_scale = Math.pow(10, i); | |
2217 | } | |
2218 | for (var j = 0; j < mults.length; j++) { | |
2219 | scale = base_scale * mults[j]; | |
2220 | low_val = Math.floor(minV / scale) * scale; | |
2221 | high_val = Math.ceil(maxV / scale) * scale; | |
2222 | nTicks = Math.abs(high_val - low_val) / scale; | |
2223 | var spacing = self.height_ / nTicks; | |
2224 | // wish I could break out of both loops at once... | |
2225 | if (spacing > pixelsPerTick) break; | |
2226 | } | |
0d64e596 DV |
2227 | if (spacing > pixelsPerTick) break; |
2228 | } | |
0d64e596 | 2229 | |
ff022deb RK |
2230 | // Construct the set of ticks. |
2231 | // Allow reverse y-axis if it's explicitly requested. | |
2232 | if (low_val > high_val) scale *= -1; | |
2233 | for (var i = 0; i < nTicks; i++) { | |
2234 | var tickV = low_val + i * scale; | |
2235 | ticks.push( {v: tickV} ); | |
2236 | } | |
0d64e596 | 2237 | } |
6a1aa64f DV |
2238 | } |
2239 | ||
0d64e596 | 2240 | // Add formatted labels to the ticks. |
ed11be50 DV |
2241 | var k; |
2242 | var k_labels = []; | |
f09fc545 | 2243 | if (attr("labelsKMB")) { |
ed11be50 DV |
2244 | k = 1000; |
2245 | k_labels = [ "K", "M", "B", "T" ]; | |
2246 | } | |
f09fc545 | 2247 | if (attr("labelsKMG2")) { |
ed11be50 DV |
2248 | if (k) self.warn("Setting both labelsKMB and labelsKMG2. Pick one!"); |
2249 | k = 1024; | |
2250 | k_labels = [ "k", "M", "G", "T" ]; | |
2251 | } | |
3c1d225b JB |
2252 | var formatter = attr('yAxisLabelFormatter') ? |
2253 | attr('yAxisLabelFormatter') : attr('yValueFormatter'); | |
2254 | ||
2255 | // Determine the number of decimal places needed for the labels below by | |
2256 | // taking the maximum number of significant figures for any label. We must | |
2257 | // take the max because we can't tell if trailing 0s are significant. | |
2258 | var numDigits = 0; | |
2259 | for (var i = 0; i < ticks.length; i++) { | |
fff1de86 | 2260 | numDigits = Math.max(Dygraph.significantFigures(ticks[i].v), numDigits); |
3c1d225b | 2261 | } |
ed11be50 | 2262 | |
0cfa06d1 | 2263 | // Add labels to the ticks. |
0d64e596 | 2264 | for (var i = 0; i < ticks.length; i++) { |
e863a17d | 2265 | if (ticks[i].label !== undefined) continue; // Use current label. |
0d64e596 | 2266 | var tickV = ticks[i].v; |
0af6e346 | 2267 | var absTickV = Math.abs(tickV); |
3c1d225b JB |
2268 | var label = (formatter !== undefined) ? |
2269 | formatter(tickV, numDigits) : tickV.toPrecision(numDigits); | |
2270 | if (k_labels.length > 0) { | |
ed11be50 DV |
2271 | // Round up to an appropriate unit. |
2272 | var n = k*k*k*k; | |
2273 | for (var j = 3; j >= 0; j--, n /= k) { | |
2274 | if (absTickV >= n) { | |
d916677a | 2275 | label = formatter(tickV / n, numDigits) + k_labels[j]; |
ed11be50 DV |
2276 | break; |
2277 | } | |
afefbcdb | 2278 | } |
6a1aa64f | 2279 | } |
d916677a | 2280 | ticks[i].label = label; |
6a1aa64f | 2281 | } |
d916677a | 2282 | |
3c1d225b | 2283 | return {ticks: ticks, numDigits: numDigits}; |
6a1aa64f DV |
2284 | }; |
2285 | ||
5011e7a1 DV |
2286 | // Computes the range of the data series (including confidence intervals). |
2287 | // series is either [ [x1, y1], [x2, y2], ... ] or | |
2288 | // [ [x1, [y1, dev_low, dev_high]], [x2, [y2, dev_low, dev_high]], ... | |
2289 | // Returns [low, high] | |
2290 | Dygraph.prototype.extremeValues_ = function(series) { | |
2291 | var minY = null, maxY = null; | |
2292 | ||
9922b78b | 2293 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
5011e7a1 DV |
2294 | if (bars) { |
2295 | // With custom bars, maxY is the max of the high values. | |
2296 | for (var j = 0; j < series.length; j++) { | |
2297 | var y = series[j][1][0]; | |
2298 | if (!y) continue; | |
2299 | var low = y - series[j][1][1]; | |
2300 | var high = y + series[j][1][2]; | |
2301 | if (low > y) low = y; // this can happen with custom bars, | |
2302 | if (high < y) high = y; // e.g. in tests/custom-bars.html | |
2303 | if (maxY == null || high > maxY) { | |
2304 | maxY = high; | |
2305 | } | |
2306 | if (minY == null || low < minY) { | |
2307 | minY = low; | |
2308 | } | |
2309 | } | |
2310 | } else { | |
2311 | for (var j = 0; j < series.length; j++) { | |
2312 | var y = series[j][1]; | |
d12999d3 | 2313 | if (y === null || isNaN(y)) continue; |
5011e7a1 DV |
2314 | if (maxY == null || y > maxY) { |
2315 | maxY = y; | |
2316 | } | |
2317 | if (minY == null || y < minY) { | |
2318 | minY = y; | |
2319 | } | |
2320 | } | |
2321 | } | |
2322 | ||
2323 | return [minY, maxY]; | |
2324 | }; | |
2325 | ||
6a1aa64f | 2326 | /** |
26ca7938 DV |
2327 | * This function is called once when the chart's data is changed or the options |
2328 | * dictionary is updated. It is _not_ called when the user pans or zooms. The | |
2329 | * idea is that values derived from the chart's data can be computed here, | |
2330 | * rather than every time the chart is drawn. This includes things like the | |
2331 | * number of axes, rolling averages, etc. | |
2332 | */ | |
2333 | Dygraph.prototype.predraw_ = function() { | |
2334 | // TODO(danvk): move more computations out of drawGraph_ and into here. | |
2335 | this.computeYAxes_(); | |
2336 | ||
2337 | // Create a new plotter. | |
70c80071 | 2338 | if (this.plotter_) this.plotter_.clear(); |
26ca7938 DV |
2339 | this.plotter_ = new DygraphCanvasRenderer(this, |
2340 | this.hidden_, this.layout_, | |
2341 | this.renderOptions_); | |
2342 | ||
0abfbd7e DV |
2343 | // The roller sits in the bottom left corner of the chart. We don't know where |
2344 | // this will be until the options are available, so it's positioned here. | |
8c69de65 | 2345 | this.createRollInterface_(); |
26ca7938 | 2346 | |
0abfbd7e DV |
2347 | // Same thing applies for the labelsDiv. It's right edge should be flush with |
2348 | // the right edge of the charting area (which may not be the same as the right | |
2349 | // edge of the div, if we have two y-axes. | |
2350 | this.positionLabelsDiv_(); | |
2351 | ||
26ca7938 DV |
2352 | // If the data or options have changed, then we'd better redraw. |
2353 | this.drawGraph_(); | |
2354 | }; | |
2355 | ||
2356 | /** | |
2357 | * Update the graph with new data. This method is called when the viewing area | |
2358 | * has changed. If the underlying data or options have changed, predraw_ will | |
2359 | * be called before drawGraph_ is called. | |
6a1aa64f DV |
2360 | * @private |
2361 | */ | |
26ca7938 DV |
2362 | Dygraph.prototype.drawGraph_ = function() { |
2363 | var data = this.rawData_; | |
2364 | ||
fe0b7c03 DV |
2365 | // This is used to set the second parameter to drawCallback, below. |
2366 | var is_initial_draw = this.is_initial_draw_; | |
2367 | this.is_initial_draw_ = false; | |
2368 | ||
3bd9c228 | 2369 | var minY = null, maxY = null; |
6a1aa64f | 2370 | this.layout_.removeAllDatasets(); |
285a6bda | 2371 | this.setColors_(); |
9317362d | 2372 | this.attrs_['pointSize'] = 0.5 * this.attr_('highlightCircleSize'); |
285a6bda | 2373 | |
354e15ab DE |
2374 | // Loop over the fields (series). Go from the last to the first, |
2375 | // because if they're stacked that's how we accumulate the values. | |
43af96e7 | 2376 | |
354e15ab DE |
2377 | var cumulative_y = []; // For stacked series. |
2378 | var datasets = []; | |
2379 | ||
f09fc545 DV |
2380 | var extremes = {}; // series name -> [low, high] |
2381 | ||
354e15ab DE |
2382 | // Loop over all fields and create datasets |
2383 | for (var i = data[0].length - 1; i >= 1; i--) { | |
1cf11047 DV |
2384 | if (!this.visibility()[i - 1]) continue; |
2385 | ||
f09fc545 | 2386 | var seriesName = this.attr_("labels")[i]; |
450fe64b | 2387 | var connectSeparatedPoints = this.attr_('connectSeparatedPoints', i); |
6e6a2b0a | 2388 | var logScale = this.attr_('logscale', i); |
450fe64b | 2389 | |
6a1aa64f DV |
2390 | var series = []; |
2391 | for (var j = 0; j < data.length; j++) { | |
6e6a2b0a RK |
2392 | var date = data[j][0]; |
2393 | var point = data[j][i]; | |
2394 | if (logScale) { | |
2395 | // On the log scale, points less than zero do not exist. | |
2396 | // This will create a gap in the chart. Note that this ignores | |
2397 | // connectSeparatedPoints. | |
e863a17d | 2398 | if (point <= 0) { |
6e6a2b0a RK |
2399 | point = null; |
2400 | } | |
2401 | series.push([date, point]); | |
2402 | } else { | |
2403 | if (point != null || !connectSeparatedPoints) { | |
2404 | series.push([date, point]); | |
2405 | } | |
f032c51d | 2406 | } |
6a1aa64f | 2407 | } |
2f5e7e1a DV |
2408 | |
2409 | // TODO(danvk): move this into predraw_. It's insane to do it here. | |
6a1aa64f DV |
2410 | series = this.rollingAverage(series, this.rollPeriod_); |
2411 | ||
2412 | // Prune down to the desired range, if necessary (for zooming) | |
1a26f3fb DV |
2413 | // Because there can be lines going to points outside of the visible area, |
2414 | // we actually prune to visible points, plus one on either side. | |
9922b78b | 2415 | var bars = this.attr_("errorBars") || this.attr_("customBars"); |
6a1aa64f DV |
2416 | if (this.dateWindow_) { |
2417 | var low = this.dateWindow_[0]; | |
2418 | var high= this.dateWindow_[1]; | |
2419 | var pruned = []; | |
1a26f3fb DV |
2420 | // TODO(danvk): do binary search instead of linear search. |
2421 | // TODO(danvk): pass firstIdx and lastIdx directly to the renderer. | |
2422 | var firstIdx = null, lastIdx = null; | |
6a1aa64f | 2423 | for (var k = 0; k < series.length; k++) { |
1a26f3fb DV |
2424 | if (series[k][0] >= low && firstIdx === null) { |
2425 | firstIdx = k; | |
2426 | } | |
2427 | if (series[k][0] <= high) { | |
2428 | lastIdx = k; | |
6a1aa64f DV |
2429 | } |
2430 | } | |
1a26f3fb DV |
2431 | if (firstIdx === null) firstIdx = 0; |
2432 | if (firstIdx > 0) firstIdx--; | |
2433 | if (lastIdx === null) lastIdx = series.length - 1; | |
2434 | if (lastIdx < series.length - 1) lastIdx++; | |
16269f6e | 2435 | this.boundaryIds_[i-1] = [firstIdx, lastIdx]; |
1a26f3fb DV |
2436 | for (var k = firstIdx; k <= lastIdx; k++) { |
2437 | pruned.push(series[k]); | |
6a1aa64f DV |
2438 | } |
2439 | series = pruned; | |
16269f6e NAG |
2440 | } else { |
2441 | this.boundaryIds_[i-1] = [0, series.length-1]; | |
6a1aa64f DV |
2442 | } |
2443 | ||
f09fc545 | 2444 | var seriesExtremes = this.extremeValues_(series); |
5011e7a1 | 2445 | |
6a1aa64f | 2446 | if (bars) { |
354e15ab DE |
2447 | for (var j=0; j<series.length; j++) { |
2448 | val = [series[j][0], series[j][1][0], series[j][1][1], series[j][1][2]]; | |
2449 | series[j] = val; | |
2450 | } | |
43af96e7 | 2451 | } else if (this.attr_("stackedGraph")) { |
43af96e7 NK |
2452 | var l = series.length; |
2453 | var actual_y; | |
2454 | for (var j = 0; j < l; j++) { | |
354e15ab DE |
2455 | // If one data set has a NaN, let all subsequent stacked |
2456 | // sets inherit the NaN -- only start at 0 for the first set. | |
2457 | var x = series[j][0]; | |
41b0f691 | 2458 | if (cumulative_y[x] === undefined) { |
354e15ab | 2459 | cumulative_y[x] = 0; |
41b0f691 | 2460 | } |
43af96e7 NK |
2461 | |
2462 | actual_y = series[j][1]; | |
354e15ab | 2463 | cumulative_y[x] += actual_y; |
43af96e7 | 2464 | |
354e15ab | 2465 | series[j] = [x, cumulative_y[x]] |
43af96e7 | 2466 | |
41b0f691 DV |
2467 | if (cumulative_y[x] > seriesExtremes[1]) { |
2468 | seriesExtremes[1] = cumulative_y[x]; | |
2469 | } | |
2470 | if (cumulative_y[x] < seriesExtremes[0]) { | |
2471 | seriesExtremes[0] = cumulative_y[x]; | |
2472 | } | |
43af96e7 | 2473 | } |
6a1aa64f | 2474 | } |
41b0f691 | 2475 | extremes[seriesName] = seriesExtremes; |
354e15ab DE |
2476 | |
2477 | datasets[i] = series; | |
6a1aa64f DV |
2478 | } |
2479 | ||
354e15ab | 2480 | for (var i = 1; i < datasets.length; i++) { |
4523c1f6 | 2481 | if (!this.visibility()[i - 1]) continue; |
354e15ab | 2482 | this.layout_.addDataset(this.attr_("labels")[i], datasets[i]); |
43af96e7 NK |
2483 | } |
2484 | ||
6faebb69 JB |
2485 | this.computeYAxisRanges_(extremes); |
2486 | this.layout_.updateOptions( { yAxes: this.axes_, | |
2487 | seriesToAxisMap: this.seriesToAxisMap_ | |
9012dd21 | 2488 | } ); |
f09fc545 | 2489 | |
6a1aa64f DV |
2490 | this.addXTicks_(); |
2491 | ||
2492 | // Tell PlotKit to use this new data and render itself | |
d033ae1c | 2493 | this.layout_.updateOptions({dateWindow: this.dateWindow_}); |
6a1aa64f DV |
2494 | this.layout_.evaluateWithError(); |
2495 | this.plotter_.clear(); | |
2496 | this.plotter_.render(); | |
f6401bf6 | 2497 | this.canvas_.getContext('2d').clearRect(0, 0, this.canvas_.width, |
2f5e7e1a | 2498 | this.canvas_.height); |
599fb4ad | 2499 | |
2fccd3dc DV |
2500 | if (is_initial_draw) { |
2501 | // Generate a static legend before any particular point is selected. | |
2502 | this.attr_('labelsDiv').innerHTML = this.generateLegendHTML_(); | |
2503 | } | |
2504 | ||
599fb4ad | 2505 | if (this.attr_("drawCallback") !== null) { |
fe0b7c03 | 2506 | this.attr_("drawCallback")(this, is_initial_draw); |
599fb4ad | 2507 | } |
6a1aa64f DV |
2508 | }; |
2509 | ||
2510 | /** | |
26ca7938 DV |
2511 | * Determine properties of the y-axes which are independent of the data |
2512 | * currently being displayed. This includes things like the number of axes and | |
2513 | * the style of the axes. It does not include the range of each axis and its | |
2514 | * tick marks. | |
2515 | * This fills in this.axes_ and this.seriesToAxisMap_. | |
2516 | * axes_ = [ { options } ] | |
2517 | * seriesToAxisMap_ = { seriesName: 0, seriesName2: 1, ... } | |
2518 | * indices are into the axes_ array. | |
f09fc545 | 2519 | */ |
26ca7938 | 2520 | Dygraph.prototype.computeYAxes_ = function() { |
00aa7f61 | 2521 | this.axes_ = [{ yAxisId : 0, g : this }]; // always have at least one y-axis. |
26ca7938 DV |
2522 | this.seriesToAxisMap_ = {}; |
2523 | ||
2524 | // Get a list of series names. | |
2525 | var labels = this.attr_("labels"); | |
1c77a3a1 | 2526 | var series = {}; |
26ca7938 | 2527 | for (var i = 1; i < labels.length; i++) series[labels[i]] = (i - 1); |
f09fc545 DV |
2528 | |
2529 | // all options which could be applied per-axis: | |
2530 | var axisOptions = [ | |
2531 | 'includeZero', | |
2532 | 'valueRange', | |
2533 | 'labelsKMB', | |
2534 | 'labelsKMG2', | |
2535 | 'pixelsPerYLabel', | |
2536 | 'yAxisLabelWidth', | |
2537 | 'axisLabelFontSize', | |
7d0e7a0d RK |
2538 | 'axisTickSize', |
2539 | 'logscale' | |
f09fc545 DV |
2540 | ]; |
2541 | ||
2542 | // Copy global axis options over to the first axis. | |
2543 | for (var i = 0; i < axisOptions.length; i++) { | |
2544 | var k = axisOptions[i]; | |
2545 | var v = this.attr_(k); | |
26ca7938 | 2546 | if (v) this.axes_[0][k] = v; |
f09fc545 DV |
2547 | } |
2548 | ||
2549 | // Go through once and add all the axes. | |
26ca7938 DV |
2550 | for (var seriesName in series) { |
2551 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2552 | var axis = this.attr_("axis", seriesName); |
2553 | if (axis == null) { | |
26ca7938 | 2554 | this.seriesToAxisMap_[seriesName] = 0; |
f09fc545 DV |
2555 | continue; |
2556 | } | |
2557 | if (typeof(axis) == 'object') { | |
2558 | // Add a new axis, making a copy of its per-axis options. | |
2559 | var opts = {}; | |
26ca7938 | 2560 | Dygraph.update(opts, this.axes_[0]); |
f09fc545 | 2561 | Dygraph.update(opts, { valueRange: null }); // shouldn't inherit this. |
00aa7f61 RK |
2562 | var yAxisId = this.axes_.length; |
2563 | opts.yAxisId = yAxisId; | |
2564 | opts.g = this; | |
f09fc545 | 2565 | Dygraph.update(opts, axis); |
26ca7938 | 2566 | this.axes_.push(opts); |
00aa7f61 | 2567 | this.seriesToAxisMap_[seriesName] = yAxisId; |
f09fc545 DV |
2568 | } |
2569 | } | |
2570 | ||
2571 | // Go through one more time and assign series to an axis defined by another | |
2572 | // series, e.g. { 'Y1: { axis: {} }, 'Y2': { axis: 'Y1' } } | |
26ca7938 DV |
2573 | for (var seriesName in series) { |
2574 | if (!series.hasOwnProperty(seriesName)) continue; | |
f09fc545 DV |
2575 | var axis = this.attr_("axis", seriesName); |
2576 | if (typeof(axis) == 'string') { | |
26ca7938 | 2577 | if (!this.seriesToAxisMap_.hasOwnProperty(axis)) { |
f09fc545 DV |
2578 | this.error("Series " + seriesName + " wants to share a y-axis with " + |
2579 | "series " + axis + ", which does not define its own axis."); | |
2580 | return null; | |
2581 | } | |
26ca7938 DV |
2582 | var idx = this.seriesToAxisMap_[axis]; |
2583 | this.seriesToAxisMap_[seriesName] = idx; | |
f09fc545 DV |
2584 | } |
2585 | } | |
1c77a3a1 DV |
2586 | |
2587 | // Now we remove series from seriesToAxisMap_ which are not visible. We do | |
2588 | // this last so that hiding the first series doesn't destroy the axis | |
2589 | // properties of the primary axis. | |
2590 | var seriesToAxisFiltered = {}; | |
2591 | var vis = this.visibility(); | |
2592 | for (var i = 1; i < labels.length; i++) { | |
2593 | var s = labels[i]; | |
2594 | if (vis[i - 1]) seriesToAxisFiltered[s] = this.seriesToAxisMap_[s]; | |
2595 | } | |
2596 | this.seriesToAxisMap_ = seriesToAxisFiltered; | |
26ca7938 DV |
2597 | }; |
2598 | ||
2599 | /** | |
2600 | * Returns the number of y-axes on the chart. | |
2601 | * @return {Number} the number of axes. | |
2602 | */ | |
2603 | Dygraph.prototype.numAxes = function() { | |
2604 | var last_axis = 0; | |
2605 | for (var series in this.seriesToAxisMap_) { | |
2606 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2607 | var idx = this.seriesToAxisMap_[series]; | |
2608 | if (idx > last_axis) last_axis = idx; | |
2609 | } | |
2610 | return 1 + last_axis; | |
2611 | }; | |
2612 | ||
2613 | /** | |
2614 | * Determine the value range and tick marks for each axis. | |
2615 | * @param {Object} extremes A mapping from seriesName -> [low, high] | |
2616 | * This fills in the valueRange and ticks fields in each entry of this.axes_. | |
2617 | */ | |
2618 | Dygraph.prototype.computeYAxisRanges_ = function(extremes) { | |
2619 | // Build a map from axis number -> [list of series names] | |
2620 | var seriesForAxis = []; | |
2621 | for (var series in this.seriesToAxisMap_) { | |
2622 | if (!this.seriesToAxisMap_.hasOwnProperty(series)) continue; | |
2623 | var idx = this.seriesToAxisMap_[series]; | |
2624 | while (seriesForAxis.length <= idx) seriesForAxis.push([]); | |
2625 | seriesForAxis[idx].push(series); | |
2626 | } | |
f09fc545 DV |
2627 | |
2628 | // Compute extreme values, a span and tick marks for each axis. | |
26ca7938 DV |
2629 | for (var i = 0; i < this.axes_.length; i++) { |
2630 | var axis = this.axes_[i]; | |
d58ae307 DV |
2631 | if (axis.valueWindow) { |
2632 | // This is only set if the user has zoomed on the y-axis. It is never set | |
2633 | // by a user. It takes precedence over axis.valueRange because, if you set | |
2634 | // valueRange, you'd still expect to be able to pan. | |
2635 | axis.computedValueRange = [axis.valueWindow[0], axis.valueWindow[1]]; | |
2636 | } else if (axis.valueRange) { | |
2637 | // This is a user-set value range for this axis. | |
26ca7938 DV |
2638 | axis.computedValueRange = [axis.valueRange[0], axis.valueRange[1]]; |
2639 | } else { | |
1c77a3a1 | 2640 | // Calculate the extremes of extremes. |
f09fc545 DV |
2641 | var series = seriesForAxis[i]; |
2642 | var minY = Infinity; // extremes[series[0]][0]; | |
2643 | var maxY = -Infinity; // extremes[series[0]][1]; | |
2644 | for (var j = 0; j < series.length; j++) { | |
2645 | minY = Math.min(extremes[series[j]][0], minY); | |
e3b6727e | 2646 | maxY = Math.max(extremes[series[j]][1], maxY); |
f09fc545 DV |
2647 | } |
2648 | if (axis.includeZero && minY > 0) minY = 0; | |
2649 | ||
2650 | // Add some padding and round up to an integer to be human-friendly. | |
2651 | var span = maxY - minY; | |
2652 | // special case: if we have no sense of scale, use +/-10% of the sole value. | |
2653 | if (span == 0) { span = maxY; } | |
f09fc545 | 2654 | |
ff022deb RK |
2655 | var maxAxisY; |
2656 | var minAxisY; | |
7d0e7a0d | 2657 | if (axis.logscale) { |
ff022deb RK |
2658 | var maxAxisY = maxY + 0.1 * span; |
2659 | var minAxisY = minY; | |
2660 | } else { | |
2661 | var maxAxisY = maxY + 0.1 * span; | |
2662 | var minAxisY = minY - 0.1 * span; | |
f09fc545 | 2663 | |
ff022deb RK |
2664 | // Try to include zero and make it minAxisY (or maxAxisY) if it makes sense. |
2665 | if (!this.attr_("avoidMinZero")) { | |
2666 | if (minAxisY < 0 && minY >= 0) minAxisY = 0; | |
2667 | if (maxAxisY > 0 && maxY <= 0) maxAxisY = 0; | |
2668 | } | |
f09fc545 | 2669 | |
ff022deb RK |
2670 | if (this.attr_("includeZero")) { |
2671 | if (maxY < 0) maxAxisY = 0; | |
2672 | if (minY > 0) minAxisY = 0; | |
2673 | } | |
f09fc545 DV |
2674 | } |
2675 | ||
26ca7938 | 2676 | axis.computedValueRange = [minAxisY, maxAxisY]; |
f09fc545 DV |
2677 | } |
2678 | ||
0d64e596 DV |
2679 | // Add ticks. By default, all axes inherit the tick positions of the |
2680 | // primary axis. However, if an axis is specifically marked as having | |
2681 | // independent ticks, then that is permissible as well. | |
2682 | if (i == 0 || axis.independentTicks) { | |
3c1d225b | 2683 | var ret = |
0d64e596 DV |
2684 | Dygraph.numericTicks(axis.computedValueRange[0], |
2685 | axis.computedValueRange[1], | |
2686 | this, | |
2687 | axis); | |
3c1d225b | 2688 | axis.ticks = ret.ticks; |
6be8e54c | 2689 | this.numYDigits_ = ret.numDigits; |
0d64e596 DV |
2690 | } else { |
2691 | var p_axis = this.axes_[0]; | |
2692 | var p_ticks = p_axis.ticks; | |
2693 | var p_scale = p_axis.computedValueRange[1] - p_axis.computedValueRange[0]; | |
2694 | var scale = axis.computedValueRange[1] - axis.computedValueRange[0]; | |
2695 | var tick_values = []; | |
2696 | for (var i = 0; i < p_ticks.length; i++) { | |
2697 | var y_frac = (p_ticks[i].v - p_axis.computedValueRange[0]) / p_scale; | |
2698 | var y_val = axis.computedValueRange[0] + y_frac * scale; | |
2699 | tick_values.push(y_val); | |
2700 | } | |
2701 | ||
3c1d225b | 2702 | var ret = |
0d64e596 DV |
2703 | Dygraph.numericTicks(axis.computedValueRange[0], |
2704 | axis.computedValueRange[1], | |
2705 | this, axis, tick_values); | |
3c1d225b | 2706 | axis.ticks = ret.ticks; |
6be8e54c | 2707 | this.numYDigits_ = ret.numDigits; |
0d64e596 | 2708 | } |
f09fc545 | 2709 | } |
f09fc545 DV |
2710 | }; |
2711 | ||
2712 | /** | |
6a1aa64f DV |
2713 | * Calculates the rolling average of a data set. |
2714 | * If originalData is [label, val], rolls the average of those. | |
2715 | * If originalData is [label, [, it's interpreted as [value, stddev] | |
2716 | * and the roll is returned in the same form, with appropriately reduced | |
2717 | * stddev for each value. | |
2718 | * Note that this is where fractional input (i.e. '5/10') is converted into | |
2719 | * decimal values. | |
2720 | * @param {Array} originalData The data in the appropriate format (see above) | |
6faebb69 JB |
2721 | * @param {Number} rollPeriod The number of points over which to average the |
2722 | * data | |
6a1aa64f | 2723 | */ |
285a6bda | 2724 | Dygraph.prototype.rollingAverage = function(originalData, rollPeriod) { |
6a1aa64f DV |
2725 | if (originalData.length < 2) |
2726 | return originalData; | |
2727 | var rollPeriod = Math.min(rollPeriod, originalData.length - 1); | |
2728 | var rollingData = []; | |
285a6bda | 2729 | var sigma = this.attr_("sigma"); |
6a1aa64f DV |
2730 | |
2731 | if (this.fractions_) { | |
2732 | var num = 0; | |
2733 | var den = 0; // numerator/denominator | |
2734 | var mult = 100.0; | |
2735 | for (var i = 0; i < originalData.length; i++) { | |
2736 | num += originalData[i][1][0]; | |
2737 | den += originalData[i][1][1]; | |
2738 | if (i - rollPeriod >= 0) { | |
2739 | num -= originalData[i - rollPeriod][1][0]; | |
2740 | den -= originalData[i - rollPeriod][1][1]; | |
2741 | } | |
2742 | ||
2743 | var date = originalData[i][0]; | |
2744 | var value = den ? num / den : 0.0; | |
285a6bda | 2745 | if (this.attr_("errorBars")) { |
6a1aa64f DV |
2746 | if (this.wilsonInterval_) { |
2747 | // For more details on this confidence interval, see: | |
2748 | // http://en.wikipedia.org/wiki/Binomial_confidence_interval | |
2749 | if (den) { | |
2750 | var p = value < 0 ? 0 : value, n = den; | |
2751 | var pm = sigma * Math.sqrt(p*(1-p)/n + sigma*sigma/(4*n*n)); | |
2752 | var denom = 1 + sigma * sigma / den; | |
2753 | var low = (p + sigma * sigma / (2 * den) - pm) / denom; | |
2754 | var high = (p + sigma * sigma / (2 * den) + pm) / denom; | |
2755 | rollingData[i] = [date, | |
2756 | [p * mult, (p - low) * mult, (high - p) * mult]]; | |
2757 | } else { | |
2758 | rollingData[i] = [date, [0, 0, 0]]; | |
2759 | } | |
2760 | } else { | |
2761 | var stddev = den ? sigma * Math.sqrt(value * (1 - value) / den) : 1.0; | |
2762 | rollingData[i] = [date, [mult * value, mult * stddev, mult * stddev]]; | |
2763 | } | |
2764 | } else { | |
2765 | rollingData[i] = [date, mult * value]; | |
2766 | } | |
2767 | } | |
9922b78b | 2768 | } else if (this.attr_("customBars")) { |
f6885d6a DV |
2769 | var low = 0; |
2770 | var mid = 0; | |
2771 | var high = 0; | |
2772 | var count = 0; | |
6a1aa64f DV |
2773 | for (var i = 0; i < originalData.length; i++) { |
2774 | var data = originalData[i][1]; | |
2775 | var y = data[1]; | |
2776 | rollingData[i] = [originalData[i][0], [y, y - data[0], data[2] - y]]; | |
f6885d6a | 2777 | |
8b91c51f | 2778 | if (y != null && !isNaN(y)) { |
49a7d0d5 DV |
2779 | low += data[0]; |
2780 | mid += y; | |
2781 | high += data[2]; | |
2782 | count += 1; | |
2783 | } | |
f6885d6a DV |
2784 | if (i - rollPeriod >= 0) { |
2785 | var prev = originalData[i - rollPeriod]; | |
8b91c51f | 2786 | if (prev[1][1] != null && !isNaN(prev[1][1])) { |
49a7d0d5 DV |
2787 | low -= prev[1][0]; |
2788 | mid -= prev[1][1]; | |
2789 | high -= prev[1][2]; | |
2790 | count -= 1; | |
2791 | } | |
f6885d6a DV |
2792 | } |
2793 | rollingData[i] = [originalData[i][0], [ 1.0 * mid / count, | |
2794 | 1.0 * (mid - low) / count, | |
2795 | 1.0 * (high - mid) / count ]]; | |
2769de62 | 2796 | } |
6a1aa64f DV |
2797 | } else { |
2798 | // Calculate the rolling average for the first rollPeriod - 1 points where | |
6faebb69 | 2799 | // there is not enough data to roll over the full number of points |
6a1aa64f | 2800 | var num_init_points = Math.min(rollPeriod - 1, originalData.length - 2); |
285a6bda | 2801 | if (!this.attr_("errorBars")){ |
5011e7a1 DV |
2802 | if (rollPeriod == 1) { |
2803 | return originalData; | |
2804 | } | |
2805 | ||
2847c1cf | 2806 | for (var i = 0; i < originalData.length; i++) { |
6a1aa64f | 2807 | var sum = 0; |
5011e7a1 | 2808 | var num_ok = 0; |
2847c1cf DV |
2809 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
2810 | var y = originalData[j][1]; | |
8b91c51f | 2811 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2812 | num_ok++; |
2847c1cf | 2813 | sum += originalData[j][1]; |
6a1aa64f | 2814 | } |
5011e7a1 | 2815 | if (num_ok) { |
2847c1cf | 2816 | rollingData[i] = [originalData[i][0], sum / num_ok]; |
5011e7a1 | 2817 | } else { |
2847c1cf | 2818 | rollingData[i] = [originalData[i][0], null]; |
5011e7a1 | 2819 | } |
6a1aa64f | 2820 | } |
2847c1cf DV |
2821 | |
2822 | } else { | |
2823 | for (var i = 0; i < originalData.length; i++) { | |
6a1aa64f DV |
2824 | var sum = 0; |
2825 | var variance = 0; | |
5011e7a1 | 2826 | var num_ok = 0; |
2847c1cf | 2827 | for (var j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) { |
5011e7a1 | 2828 | var y = originalData[j][1][0]; |
8b91c51f | 2829 | if (y == null || isNaN(y)) continue; |
5011e7a1 | 2830 | num_ok++; |
6a1aa64f DV |
2831 | sum += originalData[j][1][0]; |
2832 | variance += Math.pow(originalData[j][1][1], 2); | |
2833 | } | |
5011e7a1 DV |
2834 | if (num_ok) { |
2835 | var stddev = Math.sqrt(variance) / num_ok; | |
2836 | rollingData[i] = [originalData[i][0], | |
2837 | [sum / num_ok, sigma * stddev, sigma * stddev]]; | |
2838 | } else { | |
2839 | rollingData[i] = [originalData[i][0], [null, null, null]]; | |
2840 | } | |
6a1aa64f DV |
2841 | } |
2842 | } | |
2843 | } | |
2844 | ||
2845 | return rollingData; | |
2846 | }; | |
2847 | ||
2848 | /** | |
2849 | * Parses a date, returning the number of milliseconds since epoch. This can be | |
285a6bda DV |
2850 | * passed in as an xValueParser in the Dygraph constructor. |
2851 | * TODO(danvk): enumerate formats that this understands. | |
6a1aa64f DV |
2852 | * @param {String} A date in YYYYMMDD format. |
2853 | * @return {Number} Milliseconds since epoch. | |
2854 | * @public | |
2855 | */ | |
285a6bda | 2856 | Dygraph.dateParser = function(dateStr, self) { |
6a1aa64f | 2857 | var dateStrSlashed; |
285a6bda | 2858 | var d; |
986a5026 | 2859 | if (dateStr.search("-") != -1) { // e.g. '2009-7-12' or '2009-07-12' |
6a1aa64f | 2860 | dateStrSlashed = dateStr.replace("-", "/", "g"); |
353a0294 DV |
2861 | while (dateStrSlashed.search("-") != -1) { |
2862 | dateStrSlashed = dateStrSlashed.replace("-", "/"); | |
2863 | } | |
285a6bda | 2864 | d = Date.parse(dateStrSlashed); |
2769de62 | 2865 | } else if (dateStr.length == 8) { // e.g. '20090712' |
285a6bda | 2866 | // TODO(danvk): remove support for this format. It's confusing. |
6a1aa64f DV |
2867 | dateStrSlashed = dateStr.substr(0,4) + "/" + dateStr.substr(4,2) |
2868 | + "/" + dateStr.substr(6,2); | |
285a6bda | 2869 | d = Date.parse(dateStrSlashed); |
2769de62 DV |
2870 | } else { |
2871 | // Any format that Date.parse will accept, e.g. "2009/07/12" or | |
2872 | // "2009/07/12 12:34:56" | |
285a6bda DV |
2873 | d = Date.parse(dateStr); |
2874 | } | |
2875 | ||
2876 | if (!d || isNaN(d)) { | |
2877 | self.error("Couldn't parse " + dateStr + " as a date"); | |
2878 | } | |
2879 | return d; | |
2880 | }; | |
2881 | ||
2882 | /** | |
2883 | * Detects the type of the str (date or numeric) and sets the various | |
2884 | * formatting attributes in this.attrs_ based on this type. | |
2885 | * @param {String} str An x value. | |
2886 | * @private | |
2887 | */ | |
2888 | Dygraph.prototype.detectTypeFromString_ = function(str) { | |
2889 | var isDate = false; | |
ea62df82 | 2890 | if (str.indexOf('-') > 0 || |
285a6bda DV |
2891 | str.indexOf('/') >= 0 || |
2892 | isNaN(parseFloat(str))) { | |
2893 | isDate = true; | |
2894 | } else if (str.length == 8 && str > '19700101' && str < '20371231') { | |
2895 | // TODO(danvk): remove support for this format. | |
2896 | isDate = true; | |
2897 | } | |
2898 | ||
2899 | if (isDate) { | |
2900 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
2901 | this.attrs_.xValueParser = Dygraph.dateParser; | |
2902 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 2903 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda | 2904 | } else { |
05a9ef8d | 2905 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
2906 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
2907 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 2908 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
6a1aa64f | 2909 | } |
6a1aa64f DV |
2910 | }; |
2911 | ||
2912 | /** | |
5cd7ac68 DV |
2913 | * Parses the value as a floating point number. This is like the parseFloat() |
2914 | * built-in, but with a few differences: | |
2915 | * - the empty string is parsed as null, rather than NaN. | |
2916 | * - if the string cannot be parsed at all, an error is logged. | |
2917 | * If the string can't be parsed, this method returns null. | |
2918 | * @param {String} x The string to be parsed | |
2919 | * @param {Number} opt_line_no The line number from which the string comes. | |
2920 | * @param {String} opt_line The text of the line from which the string comes. | |
2921 | * @private | |
2922 | */ | |
2923 | ||
2924 | // Parse the x as a float or return null if it's not a number. | |
2925 | Dygraph.prototype.parseFloat_ = function(x, opt_line_no, opt_line) { | |
2926 | var val = parseFloat(x); | |
2927 | if (!isNaN(val)) return val; | |
2928 | ||
2929 | // Try to figure out what happeend. | |
2930 | // If the value is the empty string, parse it as null. | |
2931 | if (/^ *$/.test(x)) return null; | |
2932 | ||
2933 | // If it was actually "NaN", return it as NaN. | |
2934 | if (/^ *nan *$/i.test(x)) return NaN; | |
2935 | ||
2936 | // Looks like a parsing error. | |
2937 | var msg = "Unable to parse '" + x + "' as a number"; | |
2938 | if (opt_line !== null && opt_line_no !== null) { | |
2939 | msg += " on line " + (1+opt_line_no) + " ('" + opt_line + "') of CSV."; | |
2940 | } | |
2941 | this.error(msg); | |
2942 | ||
2943 | return null; | |
2944 | }; | |
2945 | ||
2946 | /** | |
6a1aa64f DV |
2947 | * Parses a string in a special csv format. We expect a csv file where each |
2948 | * line is a date point, and the first field in each line is the date string. | |
2949 | * We also expect that all remaining fields represent series. | |
285a6bda | 2950 | * if the errorBars attribute is set, then interpret the fields as: |
6a1aa64f DV |
2951 | * date, series1, stddev1, series2, stddev2, ... |
2952 | * @param {Array.<Object>} data See above. | |
2953 | * @private | |
285a6bda DV |
2954 | * |
2955 | * @return Array.<Object> An array with one entry for each row. These entries | |
2956 | * are an array of cells in that row. The first entry is the parsed x-value for | |
2957 | * the row. The second, third, etc. are the y-values. These can take on one of | |
2958 | * three forms, depending on the CSV and constructor parameters: | |
2959 | * 1. numeric value | |
2960 | * 2. [ value, stddev ] | |
2961 | * 3. [ low value, center value, high value ] | |
6a1aa64f | 2962 | */ |
285a6bda | 2963 | Dygraph.prototype.parseCSV_ = function(data) { |
6a1aa64f DV |
2964 | var ret = []; |
2965 | var lines = data.split("\n"); | |
3d67f03b DV |
2966 | |
2967 | // Use the default delimiter or fall back to a tab if that makes sense. | |
2968 | var delim = this.attr_('delimiter'); | |
2969 | if (lines[0].indexOf(delim) == -1 && lines[0].indexOf('\t') >= 0) { | |
2970 | delim = '\t'; | |
2971 | } | |
2972 | ||
285a6bda | 2973 | var start = 0; |
6a1aa64f | 2974 | if (this.labelsFromCSV_) { |
285a6bda | 2975 | start = 1; |
3d67f03b | 2976 | this.attrs_.labels = lines[0].split(delim); |
6a1aa64f | 2977 | } |
5cd7ac68 | 2978 | var line_no = 0; |
03b522a4 | 2979 | |
285a6bda DV |
2980 | var xParser; |
2981 | var defaultParserSet = false; // attempt to auto-detect x value type | |
2982 | var expectedCols = this.attr_("labels").length; | |
987840a2 | 2983 | var outOfOrder = false; |
6a1aa64f DV |
2984 | for (var i = start; i < lines.length; i++) { |
2985 | var line = lines[i]; | |
5cd7ac68 | 2986 | line_no = i; |
6a1aa64f | 2987 | if (line.length == 0) continue; // skip blank lines |
3d67f03b DV |
2988 | if (line[0] == '#') continue; // skip comment lines |
2989 | var inFields = line.split(delim); | |
285a6bda | 2990 | if (inFields.length < 2) continue; |
6a1aa64f DV |
2991 | |
2992 | var fields = []; | |
285a6bda DV |
2993 | if (!defaultParserSet) { |
2994 | this.detectTypeFromString_(inFields[0]); | |
2995 | xParser = this.attr_("xValueParser"); | |
2996 | defaultParserSet = true; | |
2997 | } | |
2998 | fields[0] = xParser(inFields[0], this); | |
6a1aa64f DV |
2999 | |
3000 | // If fractions are expected, parse the numbers as "A/B" | |
3001 | if (this.fractions_) { | |
3002 | for (var j = 1; j < inFields.length; j++) { | |
3003 | // TODO(danvk): figure out an appropriate way to flag parse errors. | |
3004 | var vals = inFields[j].split("/"); | |
7219edb3 DV |
3005 | if (vals.length != 2) { |
3006 | this.error('Expected fractional "num/den" values in CSV data ' + | |
3007 | "but found a value '" + inFields[j] + "' on line " + | |
3008 | (1 + i) + " ('" + line + "') which is not of this form."); | |
3009 | fields[j] = [0, 0]; | |
3010 | } else { | |
3011 | fields[j] = [this.parseFloat_(vals[0], i, line), | |
3012 | this.parseFloat_(vals[1], i, line)]; | |
3013 | } | |
6a1aa64f | 3014 | } |
285a6bda | 3015 | } else if (this.attr_("errorBars")) { |
6a1aa64f | 3016 | // If there are error bars, values are (value, stddev) pairs |
7219edb3 DV |
3017 | if (inFields.length % 2 != 1) { |
3018 | this.error('Expected alternating (value, stdev.) pairs in CSV data ' + | |
3019 | 'but line ' + (1 + i) + ' has an odd number of values (' + | |
3020 | (inFields.length - 1) + "): '" + line + "'"); | |
3021 | } | |
3022 | for (var j = 1; j < inFields.length; j += 2) { | |
5cd7ac68 DV |
3023 | fields[(j + 1) / 2] = [this.parseFloat_(inFields[j], i, line), |
3024 | this.parseFloat_(inFields[j + 1], i, line)]; | |
7219edb3 | 3025 | } |
9922b78b | 3026 | } else if (this.attr_("customBars")) { |
6a1aa64f DV |
3027 | // Bars are a low;center;high tuple |
3028 | for (var j = 1; j < inFields.length; j++) { | |
3029 | var vals = inFields[j].split(";"); | |
5cd7ac68 DV |
3030 | fields[j] = [ this.parseFloat_(vals[0], i, line), |
3031 | this.parseFloat_(vals[1], i, line), | |
3032 | this.parseFloat_(vals[2], i, line) ]; | |
6a1aa64f DV |
3033 | } |
3034 | } else { | |
3035 | // Values are just numbers | |
285a6bda | 3036 | for (var j = 1; j < inFields.length; j++) { |
5cd7ac68 | 3037 | fields[j] = this.parseFloat_(inFields[j], i, line); |
285a6bda | 3038 | } |
6a1aa64f | 3039 | } |
987840a2 DV |
3040 | if (ret.length > 0 && fields[0] < ret[ret.length - 1][0]) { |
3041 | outOfOrder = true; | |
3042 | } | |
285a6bda DV |
3043 | |
3044 | if (fields.length != expectedCols) { | |
3045 | this.error("Number of columns in line " + i + " (" + fields.length + | |
3046 | ") does not agree with number of labels (" + expectedCols + | |
3047 | ") " + line); | |
3048 | } | |
6d0aaa09 DV |
3049 | |
3050 | // If the user specified the 'labels' option and none of the cells of the | |
3051 | // first row parsed correctly, then they probably double-specified the | |
3052 | // labels. We go with the values set in the option, discard this row and | |
3053 | // log a warning to the JS console. | |
3054 | if (i == 0 && this.attr_('labels')) { | |
3055 | var all_null = true; | |
3056 | for (var j = 0; all_null && j < fields.length; j++) { | |
3057 | if (fields[j]) all_null = false; | |
3058 | } | |
3059 | if (all_null) { | |
3060 | this.warn("The dygraphs 'labels' option is set, but the first row of " + | |
3061 | "CSV data ('" + line + "') appears to also contain labels. " + | |
3062 | "Will drop the CSV labels and use the option labels."); | |
3063 | continue; | |
3064 | } | |
3065 | } | |
3066 | ret.push(fields); | |
6a1aa64f | 3067 | } |
987840a2 DV |
3068 | |
3069 | if (outOfOrder) { | |
3070 | this.warn("CSV is out of order; order it correctly to speed loading."); | |
3071 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
3072 | } | |
3073 | ||
6a1aa64f DV |
3074 | return ret; |
3075 | }; | |
3076 | ||
3077 | /** | |
285a6bda DV |
3078 | * The user has provided their data as a pre-packaged JS array. If the x values |
3079 | * are numeric, this is the same as dygraphs' internal format. If the x values | |
3080 | * are dates, we need to convert them from Date objects to ms since epoch. | |
3081 | * @param {Array.<Object>} data | |
3082 | * @return {Array.<Object>} data with numeric x values. | |
3083 | */ | |
3084 | Dygraph.prototype.parseArray_ = function(data) { | |
3085 | // Peek at the first x value to see if it's numeric. | |
3086 | if (data.length == 0) { | |
3087 | this.error("Can't plot empty data set"); | |
3088 | return null; | |
3089 | } | |
3090 | if (data[0].length == 0) { | |
3091 | this.error("Data set cannot contain an empty row"); | |
3092 | return null; | |
3093 | } | |
3094 | ||
3095 | if (this.attr_("labels") == null) { | |
3096 | this.warn("Using default labels. Set labels explicitly via 'labels' " + | |
3097 | "in the options parameter"); | |
3098 | this.attrs_.labels = [ "X" ]; | |
3099 | for (var i = 1; i < data[0].length; i++) { | |
3100 | this.attrs_.labels.push("Y" + i); | |
3101 | } | |
3102 | } | |
3103 | ||
2dda3850 | 3104 | if (Dygraph.isDateLike(data[0][0])) { |
285a6bda DV |
3105 | // Some intelligent defaults for a date x-axis. |
3106 | this.attrs_.xValueFormatter = Dygraph.dateString_; | |
bf640e56 | 3107 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
285a6bda DV |
3108 | this.attrs_.xTicker = Dygraph.dateTicker; |
3109 | ||
3110 | // Assume they're all dates. | |
e3ab7b40 | 3111 | var parsedData = Dygraph.clone(data); |
285a6bda DV |
3112 | for (var i = 0; i < data.length; i++) { |
3113 | if (parsedData[i].length == 0) { | |
a323ff4a | 3114 | this.error("Row " + (1 + i) + " of data is empty"); |
285a6bda DV |
3115 | return null; |
3116 | } | |
3117 | if (parsedData[i][0] == null | |
3a909ec5 DV |
3118 | || typeof(parsedData[i][0].getTime) != 'function' |
3119 | || isNaN(parsedData[i][0].getTime())) { | |
be96a1f5 | 3120 | this.error("x value in row " + (1 + i) + " is not a Date"); |
285a6bda DV |
3121 | return null; |
3122 | } | |
3123 | parsedData[i][0] = parsedData[i][0].getTime(); | |
3124 | } | |
3125 | return parsedData; | |
3126 | } else { | |
3127 | // Some intelligent defaults for a numeric x-axis. | |
6be8e54c | 3128 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
3129 | this.attrs_.xTicker = Dygraph.numericTicks; |
3130 | return data; | |
3131 | } | |
3132 | }; | |
3133 | ||
3134 | /** | |
79420a1e DV |
3135 | * Parses a DataTable object from gviz. |
3136 | * The data is expected to have a first column that is either a date or a | |
3137 | * number. All subsequent columns must be numbers. If there is a clear mismatch | |
3138 | * between this.xValueParser_ and the type of the first column, it will be | |
a685723c | 3139 | * fixed. Fills out rawData_. |
79420a1e DV |
3140 | * @param {Array.<Object>} data See above. |
3141 | * @private | |
3142 | */ | |
285a6bda | 3143 | Dygraph.prototype.parseDataTable_ = function(data) { |
79420a1e DV |
3144 | var cols = data.getNumberOfColumns(); |
3145 | var rows = data.getNumberOfRows(); | |
3146 | ||
d955e223 | 3147 | var indepType = data.getColumnType(0); |
4440f6c8 | 3148 | if (indepType == 'date' || indepType == 'datetime') { |
285a6bda DV |
3149 | this.attrs_.xValueFormatter = Dygraph.dateString_; |
3150 | this.attrs_.xValueParser = Dygraph.dateParser; | |
3151 | this.attrs_.xTicker = Dygraph.dateTicker; | |
bf640e56 | 3152 | this.attrs_.xAxisLabelFormatter = Dygraph.dateAxisFormatter; |
33127159 | 3153 | } else if (indepType == 'number') { |
6be8e54c | 3154 | this.attrs_.xValueFormatter = this.attrs_.yValueFormatter; |
285a6bda DV |
3155 | this.attrs_.xValueParser = function(x) { return parseFloat(x); }; |
3156 | this.attrs_.xTicker = Dygraph.numericTicks; | |
bf640e56 | 3157 | this.attrs_.xAxisLabelFormatter = this.attrs_.xValueFormatter; |
285a6bda | 3158 | } else { |
987840a2 DV |
3159 | this.error("only 'date', 'datetime' and 'number' types are supported for " + |
3160 | "column 1 of DataTable input (Got '" + indepType + "')"); | |
79420a1e DV |
3161 | return null; |
3162 | } | |
3163 | ||
a685723c DV |
3164 | // Array of the column indices which contain data (and not annotations). |
3165 | var colIdx = []; | |
3166 | var annotationCols = {}; // data index -> [annotation cols] | |
3167 | var hasAnnotations = false; | |
3168 | for (var i = 1; i < cols; i++) { | |
3169 | var type = data.getColumnType(i); | |
3170 | if (type == 'number') { | |
3171 | colIdx.push(i); | |
3172 | } else if (type == 'string' && this.attr_('displayAnnotations')) { | |
3173 | // This is OK -- it's an annotation column. | |
3174 | var dataIdx = colIdx[colIdx.length - 1]; | |
3175 | if (!annotationCols.hasOwnProperty(dataIdx)) { | |
3176 | annotationCols[dataIdx] = [i]; | |
3177 | } else { | |
3178 | annotationCols[dataIdx].push(i); | |
3179 | } | |
3180 | hasAnnotations = true; | |
3181 | } else { | |
3182 | this.error("Only 'number' is supported as a dependent type with Gviz." + | |
3183 | " 'string' is only supported if displayAnnotations is true"); | |
3184 | } | |
3185 | } | |
3186 | ||
3187 | // Read column labels | |
3188 | // TODO(danvk): add support back for errorBars | |
3189 | var labels = [data.getColumnLabel(0)]; | |
3190 | for (var i = 0; i < colIdx.length; i++) { | |
3191 | labels.push(data.getColumnLabel(colIdx[i])); | |
f9348814 | 3192 | if (this.attr_("errorBars")) i += 1; |
a685723c DV |
3193 | } |
3194 | this.attrs_.labels = labels; | |
3195 | cols = labels.length; | |
3196 | ||
79420a1e | 3197 | var ret = []; |
987840a2 | 3198 | var outOfOrder = false; |
a685723c | 3199 | var annotations = []; |
79420a1e DV |
3200 | for (var i = 0; i < rows; i++) { |
3201 | var row = []; | |
debe4434 DV |
3202 | if (typeof(data.getValue(i, 0)) === 'undefined' || |
3203 | data.getValue(i, 0) === null) { | |
129569a5 FD |
3204 | this.warn("Ignoring row " + i + |
3205 | " of DataTable because of undefined or null first column."); | |
debe4434 DV |
3206 | continue; |
3207 | } | |
3208 | ||
c21d2c2d | 3209 | if (indepType == 'date' || indepType == 'datetime') { |
d955e223 DV |
3210 | row.push(data.getValue(i, 0).getTime()); |
3211 | } else { | |
3212 | row.push(data.getValue(i, 0)); | |
3213 | } | |
3e3f84e4 | 3214 | if (!this.attr_("errorBars")) { |
a685723c DV |
3215 | for (var j = 0; j < colIdx.length; j++) { |
3216 | var col = colIdx[j]; | |
3217 | row.push(data.getValue(i, col)); | |
3218 | if (hasAnnotations && | |
3219 | annotationCols.hasOwnProperty(col) && | |
3220 | data.getValue(i, annotationCols[col][0]) != null) { | |
3221 | var ann = {}; | |
3222 | ann.series = data.getColumnLabel(col); | |
3223 | ann.xval = row[0]; | |
3224 | ann.shortText = String.fromCharCode(65 /* A */ + annotations.length) | |
3225 | ann.text = ''; | |
3226 | for (var k = 0; k < annotationCols[col].length; k++) { | |
3227 | if (k) ann.text += "\n"; | |
3228 | ann.text += data.getValue(i, annotationCols[col][k]); | |
3229 | } | |
3230 | annotations.push(ann); | |
3231 | } | |
3e3f84e4 DV |
3232 | } |
3233 | } else { | |
3234 | for (var j = 0; j < cols - 1; j++) { | |
3235 | row.push([ data.getValue(i, 1 + 2 * j), data.getValue(i, 2 + 2 * j) ]); | |
3236 | } | |
79420a1e | 3237 | } |
987840a2 DV |
3238 | if (ret.length > 0 && row[0] < ret[ret.length - 1][0]) { |
3239 | outOfOrder = true; | |
3240 | } | |
1f7f664b DV |
3241 | |
3242 | // Strip out infinities, which give dygraphs problems later on. | |
3243 | for (var j = 0; j < row.length; j++) { | |
3244 | if (!isFinite(row[j])) row[j] = null; | |
3245 | } | |
243d96e8 | 3246 | ret.push(row); |
79420a1e | 3247 | } |
987840a2 DV |
3248 | |
3249 | if (outOfOrder) { | |
3250 | this.warn("DataTable is out of order; order it correctly to speed loading."); | |
3251 | ret.sort(function(a,b) { return a[0] - b[0] }); | |
3252 | } | |
a685723c DV |
3253 | this.rawData_ = ret; |
3254 | ||
3255 | if (annotations.length > 0) { | |
3256 | this.setAnnotations(annotations, true); | |
3257 | } | |
79420a1e DV |
3258 | } |
3259 | ||
24e5350c | 3260 | // These functions are all based on MochiKit. |
fc80a396 DV |
3261 | Dygraph.update = function (self, o) { |
3262 | if (typeof(o) != 'undefined' && o !== null) { | |
3263 | for (var k in o) { | |
85b99f0b DV |
3264 | if (o.hasOwnProperty(k)) { |
3265 | self[k] = o[k]; | |
3266 | } | |
fc80a396 DV |
3267 | } |
3268 | } | |
3269 | return self; | |
3270 | }; | |
3271 | ||
2dda3850 DV |
3272 | Dygraph.isArrayLike = function (o) { |
3273 | var typ = typeof(o); | |
3274 | if ( | |
c21d2c2d | 3275 | (typ != 'object' && !(typ == 'function' && |
2dda3850 DV |
3276 | typeof(o.item) == 'function')) || |
3277 | o === null || | |
3278 | typeof(o.length) != 'number' || | |
3279 | o.nodeType === 3 | |
3280 | ) { | |
3281 | return false; | |
3282 | } | |
3283 | return true; | |
3284 | }; | |
3285 | ||
3286 | Dygraph.isDateLike = function (o) { | |
3287 | if (typeof(o) != "object" || o === null || | |
3288 | typeof(o.getTime) != 'function') { | |
3289 | return false; | |
3290 | } | |
3291 | return true; | |
3292 | }; | |
3293 | ||
e3ab7b40 DV |
3294 | Dygraph.clone = function(o) { |
3295 | // TODO(danvk): figure out how MochiKit's version works | |
3296 | var r = []; | |
3297 | for (var i = 0; i < o.length; i++) { | |
3298 | if (Dygraph.isArrayLike(o[i])) { | |
3299 | r.push(Dygraph.clone(o[i])); | |
3300 | } else { | |
3301 | r.push(o[i]); | |
3302 | } | |
3303 | } | |
3304 | return r; | |
24e5350c DV |
3305 | }; |
3306 | ||
2dda3850 | 3307 | |
79420a1e | 3308 | /** |
6a1aa64f DV |
3309 | * Get the CSV data. If it's in a function, call that function. If it's in a |
3310 | * file, do an XMLHttpRequest to get it. | |
3311 | * @private | |
3312 | */ | |
285a6bda | 3313 | Dygraph.prototype.start_ = function() { |
6a1aa64f | 3314 | if (typeof this.file_ == 'function') { |
285a6bda | 3315 | // CSV string. Pretend we got it via XHR. |
6a1aa64f | 3316 | this.loadedEvent_(this.file_()); |
2dda3850 | 3317 | } else if (Dygraph.isArrayLike(this.file_)) { |
285a6bda | 3318 | this.rawData_ = this.parseArray_(this.file_); |
26ca7938 | 3319 | this.predraw_(); |
79420a1e DV |
3320 | } else if (typeof this.file_ == 'object' && |
3321 | typeof this.file_.getColumnRange == 'function') { | |
3322 | // must be a DataTable from gviz. | |
a685723c | 3323 | this.parseDataTable_(this.file_); |
26ca7938 | 3324 | this.predraw_(); |
285a6bda DV |
3325 | } else if (typeof this.file_ == 'string') { |
3326 | // Heuristic: a newline means it's CSV data. Otherwise it's an URL. | |
3327 | if (this.file_.indexOf('\n') >= 0) { | |
3328 | this.loadedEvent_(this.file_); | |
3329 | } else { | |
3330 | var req = new XMLHttpRequest(); | |
3331 | var caller = this; | |
3332 | req.onreadystatechange = function () { | |
3333 | if (req.readyState == 4) { | |
3334 | if (req.status == 200) { | |
3335 | caller.loadedEvent_(req.responseText); | |
3336 | } | |
6a1aa64f | 3337 | } |
285a6bda | 3338 | }; |
6a1aa64f | 3339 | |
285a6bda DV |
3340 | req.open("GET", this.file_, true); |
3341 | req.send(null); | |
3342 | } | |
3343 | } else { | |
3344 | this.error("Unknown data format: " + (typeof this.file_)); | |
6a1aa64f DV |
3345 | } |
3346 | }; | |
3347 | ||
3348 | /** | |
3349 | * Changes various properties of the graph. These can include: | |
3350 | * <ul> | |
3351 | * <li>file: changes the source data for the graph</li> | |
3352 | * <li>errorBars: changes whether the data contains stddev</li> | |
3353 | * </ul> | |
3354 | * @param {Object} attrs The new properties and values | |
3355 | */ | |
285a6bda DV |
3356 | Dygraph.prototype.updateOptions = function(attrs) { |
3357 | // TODO(danvk): this is a mess. Rethink this function. | |
c65f2303 | 3358 | if ('rollPeriod' in attrs) { |
6a1aa64f DV |
3359 | this.rollPeriod_ = attrs.rollPeriod; |
3360 | } | |
c65f2303 | 3361 | if ('dateWindow' in attrs) { |
6a1aa64f DV |
3362 | this.dateWindow_ = attrs.dateWindow; |
3363 | } | |
450fe64b DV |
3364 | |
3365 | // TODO(danvk): validate per-series options. | |
46dde5f9 DV |
3366 | // Supported: |
3367 | // strokeWidth | |
3368 | // pointSize | |
3369 | // drawPoints | |
3370 | // highlightCircleSize | |
450fe64b | 3371 | |
fc80a396 | 3372 | Dygraph.update(this.user_attrs_, attrs); |
87bb7958 | 3373 | Dygraph.update(this.renderOptions_, attrs); |
285a6bda DV |
3374 | |
3375 | this.labelsFromCSV_ = (this.attr_("labels") == null); | |
3376 | ||
3377 | // TODO(danvk): this doesn't match the constructor logic | |
3378 | this.layout_.updateOptions({ 'errorBars': this.attr_("errorBars") }); | |
5e50289f | 3379 | if (attrs['file']) { |
6a1aa64f DV |
3380 | this.file_ = attrs['file']; |
3381 | this.start_(); | |
3382 | } else { | |
26ca7938 | 3383 | this.predraw_(); |
6a1aa64f DV |
3384 | } |
3385 | }; | |
3386 | ||
3387 | /** | |
697e70b2 DV |
3388 | * Resizes the dygraph. If no parameters are specified, resizes to fill the |
3389 | * containing div (which has presumably changed size since the dygraph was | |
3390 | * instantiated. If the width/height are specified, the div will be resized. | |
964f30c6 DV |
3391 | * |
3392 | * This is far more efficient than destroying and re-instantiating a | |
3393 | * Dygraph, since it doesn't have to reparse the underlying data. | |
3394 | * | |
697e70b2 DV |
3395 | * @param {Number} width Width (in pixels) |
3396 | * @param {Number} height Height (in pixels) | |
3397 | */ | |
3398 | Dygraph.prototype.resize = function(width, height) { | |
e8c7ef86 DV |
3399 | if (this.resize_lock) { |
3400 | return; | |
3401 | } | |
3402 | this.resize_lock = true; | |
3403 | ||
697e70b2 DV |
3404 | if ((width === null) != (height === null)) { |
3405 | this.warn("Dygraph.resize() should be called with zero parameters or " + | |
3406 | "two non-NULL parameters. Pretending it was zero."); | |
3407 | width = height = null; | |
3408 | } | |
3409 | ||
b16e6369 | 3410 | // TODO(danvk): there should be a clear() method. |
697e70b2 | 3411 | this.maindiv_.innerHTML = ""; |
b16e6369 DV |
3412 | this.attrs_.labelsDiv = null; |
3413 | ||
697e70b2 DV |
3414 | if (width) { |
3415 | this.maindiv_.style.width = width + "px"; | |
3416 | this.maindiv_.style.height = height + "px"; | |
3417 | this.width_ = width; | |
3418 | this.height_ = height; | |
3419 | } else { | |
3420 | this.width_ = this.maindiv_.offsetWidth; | |
3421 | this.height_ = this.maindiv_.offsetHeight; | |
3422 | } | |
3423 | ||
3424 | this.createInterface_(); | |
26ca7938 | 3425 | this.predraw_(); |
e8c7ef86 DV |
3426 | |
3427 | this.resize_lock = false; | |
697e70b2 DV |
3428 | }; |
3429 | ||
3430 | /** | |
6faebb69 | 3431 | * Adjusts the number of points in the rolling average. Updates the graph to |
6a1aa64f | 3432 | * reflect the new averaging period. |
6faebb69 | 3433 | * @param {Number} length Number of points over which to average the data. |
6a1aa64f | 3434 | */ |
285a6bda | 3435 | Dygraph.prototype.adjustRoll = function(length) { |
6a1aa64f | 3436 | this.rollPeriod_ = length; |
26ca7938 | 3437 | this.predraw_(); |
6a1aa64f | 3438 | }; |
540d00f1 | 3439 | |
f8cfec73 | 3440 | /** |
1cf11047 DV |
3441 | * Returns a boolean array of visibility statuses. |
3442 | */ | |
3443 | Dygraph.prototype.visibility = function() { | |
3444 | // Do lazy-initialization, so that this happens after we know the number of | |
3445 | // data series. | |
3446 | if (!this.attr_("visibility")) { | |
f38dec01 | 3447 | this.attrs_["visibility"] = []; |
1cf11047 DV |
3448 | } |
3449 | while (this.attr_("visibility").length < this.rawData_[0].length - 1) { | |
f38dec01 | 3450 | this.attr_("visibility").push(true); |
1cf11047 DV |
3451 | } |
3452 | return this.attr_("visibility"); | |
3453 | }; | |
3454 | ||
3455 | /** | |
3456 | * Changes the visiblity of a series. | |
3457 | */ | |
3458 | Dygraph.prototype.setVisibility = function(num, value) { | |
3459 | var x = this.visibility(); | |
a6c109c1 | 3460 | if (num < 0 || num >= x.length) { |
1cf11047 DV |
3461 | this.warn("invalid series number in setVisibility: " + num); |
3462 | } else { | |
3463 | x[num] = value; | |
26ca7938 | 3464 | this.predraw_(); |
1cf11047 DV |
3465 | } |
3466 | }; | |
3467 | ||
3468 | /** | |
5c528fa2 DV |
3469 | * Update the list of annotations and redraw the chart. |
3470 | */ | |
a685723c | 3471 | Dygraph.prototype.setAnnotations = function(ann, suppressDraw) { |
3c51ab74 DV |
3472 | // Only add the annotation CSS rule once we know it will be used. |
3473 | Dygraph.addAnnotationRule(); | |
5c528fa2 DV |
3474 | this.annotations_ = ann; |
3475 | this.layout_.setAnnotations(this.annotations_); | |
a685723c | 3476 | if (!suppressDraw) { |
26ca7938 | 3477 | this.predraw_(); |
a685723c | 3478 | } |
5c528fa2 DV |
3479 | }; |
3480 | ||
3481 | /** | |
3482 | * Return the list of annotations. | |
3483 | */ | |
3484 | Dygraph.prototype.annotations = function() { | |
3485 | return this.annotations_; | |
3486 | }; | |
3487 | ||
46dde5f9 DV |
3488 | /** |
3489 | * Get the index of a series (column) given its name. The first column is the | |
3490 | * x-axis, so the data series start with index 1. | |
3491 | */ | |
3492 | Dygraph.prototype.indexFromSetName = function(name) { | |
3493 | var labels = this.attr_("labels"); | |
3494 | for (var i = 0; i < labels.length; i++) { | |
3495 | if (labels[i] == name) return i; | |
3496 | } | |
3497 | return null; | |
3498 | }; | |
3499 | ||
5c528fa2 DV |
3500 | Dygraph.addAnnotationRule = function() { |
3501 | if (Dygraph.addedAnnotationCSS) return; | |
3502 | ||
5c528fa2 DV |
3503 | var rule = "border: 1px solid black; " + |
3504 | "background-color: white; " + | |
3505 | "text-align: center;"; | |
22186871 DV |
3506 | |
3507 | var styleSheetElement = document.createElement("style"); | |
3508 | styleSheetElement.type = "text/css"; | |
3509 | document.getElementsByTagName("head")[0].appendChild(styleSheetElement); | |
3510 | ||
3511 | // Find the first style sheet that we can access. | |
3512 | // We may not add a rule to a style sheet from another domain for security | |
3513 | // reasons. This sometimes comes up when using gviz, since the Google gviz JS | |
3514 | // adds its own style sheets from google.com. | |
3515 | for (var i = 0; i < document.styleSheets.length; i++) { | |
3516 | if (document.styleSheets[i].disabled) continue; | |
3517 | var mysheet = document.styleSheets[i]; | |
3518 | try { | |
3519 | if (mysheet.insertRule) { // Firefox | |
3520 | var idx = mysheet.cssRules ? mysheet.cssRules.length : 0; | |
3521 | mysheet.insertRule(".dygraphDefaultAnnotation { " + rule + " }", idx); | |
3522 | } else if (mysheet.addRule) { // IE | |
3523 | mysheet.addRule(".dygraphDefaultAnnotation", rule); | |
3524 | } | |
3525 | Dygraph.addedAnnotationCSS = true; | |
3526 | return; | |
3527 | } catch(err) { | |
3528 | // Was likely a security exception. | |
3529 | } | |
5c528fa2 DV |
3530 | } |
3531 | ||
22186871 | 3532 | this.warn("Unable to add default annotation CSS rule; display may be off."); |
5c528fa2 DV |
3533 | } |
3534 | ||
3535 | /** | |
f8cfec73 DV |
3536 | * Create a new canvas element. This is more complex than a simple |
3537 | * document.createElement("canvas") because of IE and excanvas. | |
3538 | */ | |
3539 | Dygraph.createCanvas = function() { | |
3540 | var canvas = document.createElement("canvas"); | |
3541 | ||
3542 | isIE = (/MSIE/.test(navigator.userAgent) && !window.opera); | |
8b8f2d59 | 3543 | if (isIE && (typeof(G_vmlCanvasManager) != 'undefined')) { |
f8cfec73 DV |
3544 | canvas = G_vmlCanvasManager.initElement(canvas); |
3545 | } | |
3546 | ||
3547 | return canvas; | |
3548 | }; | |
3549 | ||
540d00f1 DV |
3550 | |
3551 | /** | |
285a6bda | 3552 | * A wrapper around Dygraph that implements the gviz API. |
540d00f1 DV |
3553 | * @param {Object} container The DOM object the visualization should live in. |
3554 | */ | |
285a6bda | 3555 | Dygraph.GVizChart = function(container) { |
540d00f1 DV |
3556 | this.container = container; |
3557 | } | |
3558 | ||
285a6bda | 3559 | Dygraph.GVizChart.prototype.draw = function(data, options) { |
c91f4ae8 DV |
3560 | // Clear out any existing dygraph. |
3561 | // TODO(danvk): would it make more sense to simply redraw using the current | |
3562 | // date_graph object? | |
540d00f1 | 3563 | this.container.innerHTML = ''; |
c91f4ae8 DV |
3564 | if (typeof(this.date_graph) != 'undefined') { |
3565 | this.date_graph.destroy(); | |
3566 | } | |
3567 | ||
285a6bda | 3568 | this.date_graph = new Dygraph(this.container, data, options); |
540d00f1 | 3569 | } |
285a6bda | 3570 | |
239c712d NAG |
3571 | /** |
3572 | * Google charts compatible setSelection | |
50360fd0 | 3573 | * Only row selection is supported, all points in the row will be highlighted |
239c712d NAG |
3574 | * @param {Array} array of the selected cells |
3575 | * @public | |
3576 | */ | |
3577 | Dygraph.GVizChart.prototype.setSelection = function(selection_array) { | |
3578 | var row = false; | |
3579 | if (selection_array.length) { | |
3580 | row = selection_array[0].row; | |
3581 | } | |
3582 | this.date_graph.setSelection(row); | |
3583 | } | |
3584 | ||
103b7292 NAG |
3585 | /** |
3586 | * Google charts compatible getSelection implementation | |
3587 | * @return {Array} array of the selected cells | |
3588 | * @public | |
3589 | */ | |
3590 | Dygraph.GVizChart.prototype.getSelection = function() { | |
3591 | var selection = []; | |
50360fd0 | 3592 | |
103b7292 | 3593 | var row = this.date_graph.getSelection(); |
50360fd0 | 3594 | |
103b7292 | 3595 | if (row < 0) return selection; |
50360fd0 | 3596 | |
103b7292 NAG |
3597 | col = 1; |
3598 | for (var i in this.date_graph.layout_.datasets) { | |
3599 | selection.push({row: row, column: col}); | |
3600 | col++; | |
3601 | } | |
3602 | ||
3603 | return selection; | |
3604 | } | |
3605 | ||
285a6bda DV |
3606 | // Older pages may still use this name. |
3607 | DateGraph = Dygraph; |